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{{short description|Woman with status of ritual uncleanness during and after menstruation in Jewish law}}
{{For|the Talmudical tractate|Niddah (Talmud)}}
{{italic title}}
{{Infobox Halacha
 | verse  = {{Tanakhverse|Leviticus|15:19-30}} {{Tanakhverse|Leviticus|18:19}} {{Tanakhverse|Leviticus|20:18}}
 | rambam = ''Kedushah'' (Holiness): ''Issurei Biah'' (forbidden sexual relations): 4–11
 | talmud = [[Niddah (Talmud)|Niddah]]
 | sa     = [[Yoreh De'ah]] 183–202
}}
{{Tumah and taharah}}
{{Jews and Judaism sidebar|Culture}}

A '''niddah''' (alternative forms: '''nidda''', '''nida''', or '''nidah'''; {{langx|he|נִדָּה}} ''nidá''), in traditional [[Judaism]], is a woman who has experienced a uterine discharge of blood (most commonly during [[menstruation]]), or a woman who has menstruated and not yet completed the associated requirement of immersion in a ''[[mikveh]]'' (ritual bath).

In the [[Book of Leviticus]], the [[Torah]] prohibits sexual intercourse with a ''niddah''.<ref>Leviticus 15:19-30, 18:19, 20:18</ref> The prohibition has been maintained in traditional Jewish law and by the [[Samaritans]]. It has largely been rejected by adherents of [[Reform Judaism]] and other liberal branches.<ref name="JWA">{{Cite web|url=https://jwa.org/encyclopedia/article/female-purity-niddah|title=Female Purity (Niddah) {{!}} Jewish Women's Archive|website=jwa.org|access-date=2020-02-19}}</ref><ref name=":1">{{Cite web|url=https://www.myjewishlearning.com/article/the-laws-of-niddah-taharat-hamishpaha/|title=Why Some Jewish Women Go to the Mikveh Each Month|website=My Jewish Learning|language=en-US|access-date=2020-02-19}}</ref>

In [[rabbinic Judaism]], additional stringencies and prohibitions have accumulated over time, increasing the scope of various aspects of niddah, including: duration (12-day minimum for Ashkenazim, and 11 days for Sephardim); expanding the prohibition against sex to include: sleeping in adjoining beds, any physical contact,<ref>This prohibition may be Biblical.</ref> and even passing objects to spouse; and requiring a detailed [[ritual purification]] process.<ref name="JWA"/><ref name="Werczberger2020">
{{cite book |last1=Werczberger |first1=R. |last2=Guzmen-Carmeli |first2=S. |editor1-last=Yaden |editor1-first=David Bryce |editor2-last=Newberg |editor2-first=Andrew B. |editor3-last=Zhao |editor3-first=Yukun |editor4-last=Peng |editor4-first=Kaiping |title=Rituals and Practices in World Religions: Cross-cultural Scholarship to Inform Research and Clinical Contexts |date=2020 |publisher=Springer |isbn=9783030279530 |chapter-url=https://books.google.com/books?id=r0fODwAAQBAJ&pg=PA123 |chapter=Judaim |quote=women and menstruation. Later on, the rabbis increased the period of sexual separation between a menstruating wife and her husband from 7 days total to 7 "clean days" and a minimum of 11 days for Sephardim and 12 days for Ashkenazim. The Biblical law also requires that following that period, the woman would immerse herself in the [[mikveh]]. In general, the immersion in the miqveh must take place after dark. The woman must undress completely and clean herself before entering. The immersion must be witnessed by a Jewish woman (balanit) whose role is to ensure that all body parts, including the hair, are submerged in the water. Some attendants offer to check the hands, feet, and back for possible barriers (chatzitzot) between the body and the water, such as nail polish. Upon immersing, the woman recites the designated blessing...}}
</ref><ref name="Liss2015">
{{cite book |last1=Liss |title=Discourses of Purity in Transcultural Perspective (300–1600) |date=2015 |publisher=BRILL |isbn=978-90-04-28975-8 |page=272 |chapter-url=https://books.google.com/books?id=wTm2CAAAQBAJ&pg=PA272 |chapter=Patterns of intensification}}
</ref>

Since the late 19th century, with the influence of German Modern Orthodoxy, the laws concerning ''niddah'' are also referred to as ''Taharat haMishpacha'' ({{Script/Hebrew|טָהֳרַת הַמִּשְׁפָּחָה}}, Hebrew for ''family purity''), an [[Apologetics|apologetic]] euphemism coined to de-emphasize the "impurity" of the woman (a concept criticized by the Reform movement) and to exhort the masses by warning that niddah can have consequences on the purity of offspring.<ref name="JWA"/><ref name="Marmon2017">
{{cite book |last1=Marmon-Grumet |first1=Naomi |editor1-last=Gross |editor1-first=Martine |editor2-last=Nizard |editor2-first=Sophie |editor3-last=Scioldo-Zurcher |editor3-first=Yann |title=Gender, Families and Transmission in the Contemporary Jewish Context |date=2017 |publisher=Cambridge Scholars Publishing |isbn=978-1-4438-9232-2 |page=40 |chapter-url=https://books.google.com/books?id=UmbXDgAAQBAJ&pg=PA40 |chapter=The Transmission of Sexual Mores, Norms of Procreation, and Gender Expectations through Pre-Marital Counselling (Hadrakhat Hatanim/Kallot) |quote=According to Marienberg (2003), the term "taharat hamishpaha", was most likely coined to hide the association of impurity and encourage thinking about the Talmudic notion that niddah can have consequences on the purity of offspring.}}
</ref><ref name="Wasserfall2015">
{{cite book |last1=Wasserfall |first1=Rahel |title=Women and Water: Menstruation in Jewish Life and Law |date=2015 |publisher=Brandeis University Press |isbn=978-1-61168-870-2 |pages=32–33 |url=https://books.google.com/books?id=QyczCwAAQBAJ&pg=PA32 |quote=probably generated by the Neo-Orthodox movement as a response to the Reform rejection of some of the normative menstrual laws, particularly use of the miqveh. The Reform movement claimed that the law was instituted at a time when public bathing facilities were the norm, but was no longer valid with the advent of home bathtubs and greater concern for personal hygiene... The term family purity is euphemistic and somewhat misleading, since the topic is, in fact, ritual impurity.}}
</ref><ref name="Biale2008">
{{cite book|author1-link=David Biale |last1=Biale |first1=David |title=Blood and Belief: The Circulation of a Symbol Between Jews and Christians |date=2008 |publisher=University of California Press |isbn=978-0-520-25798-6 |page=175 |url=https://books.google.com/books?id=07IwDwAAQBAJ&pg=PA175 |quote=for the modern Orthodox Jews of Germany, the phrase "family purity" (Reinheit des Familienlebens) came to designate the laws of menstruation. Whereas in Talmudic law, a menstruating woman conveyed a kind of technical impurity, in this new, bourgeois conception, the family as a whole was purified by avoidance of menstrual blood.}}
</ref><ref name="Stollman2006">
{{cite journal |last1=Stollman |first1=Aviad |title=A Lifetime Companion to the Laws of Jewish Family Life, and: Man and Woman: Guidance for Newlyweds (review) |journal=Nashim: A Journal of Jewish Women's Studies & Gender Issues |date=2006 |volume=12 |issue=1 |pages=309–329 |url=https://www.academia.edu/8841371 |issn=1565-5288 |quote=According to Evyatar Marienberg, the term "Tahorat haMishpahah", itself is of German-Jewish origin, late in the nineteenth century, probably a translation of the expression "Reinheit des Familienlebens". The original expression was most likely coined as an attempt to suppress the obvious halakhic fact that a woman who menstruates is impure. Instead of discussing the impurity of the niddah, one is encouraged to think of the purity of the family. It is also probable that the term came into use to emphasize the talmudic notion that not keeping the laws of niddah can have consequences on the purity of the offspring.}}
</ref><ref name="Encyclopedia2005">
{{cite encyclopedia |title=Purification: Purification in Judaism |encyclopedia=Encyclopedia of Religion |edition=2nd |year=2005 |last=Fonrobert |first=Charlotte Elisheva |editor-last=Jones |editor-first=Lindsay |publisher=Macmillan Reference USA |volume=11 |url=https://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/purification-purification-judaism |quote=This term is technically a misnomer... It entered Jewish legal discourse in the late nineteenth and early twentieth century, before it was popularized in the market of handbooks for married couples. One of its main functions is rooted in its polemical force, vis a vis liberal, non-observant Jews}}</ref>

== Etymology and usage ==
''Niddah'' has the general meaning of "expulsion" and "elimination",<ref name="Sigvartsen2017">{{cite journal |journal=Papers |last1=Sigvartsen |first1=Jan A. |title=The Biblical Law of Niddah and Its Muslim |year=2017 |url=https://digitalcommons.andrews.edu/cgi/viewcontent.cgi?article=1008&context=papers}}</ref> coming from the root ''ndd'', "to make distant" (the Aramaic Bible translations use the root rhq, "to be distant"), reflecting the physical separation of women during their menstrual periods,<ref name="Wasserfall1999">{{cite book |last1=Wasserfall |first1=Rahel R. |title=Women and Water: Menstruation in Jewish life and law |page=23 |date=1999 |publisher=University Press of New England |isbn=978-0-87451-960-0 |url=https://books.google.com/books?id=i0WxScTKeQwC&pg=PA23}}</ref> who were "discharged" and "excluded" from  society by being banished to and quarantined in separate quarters.<ref name="Sigvartsen2017"/> Later in the biblical corpus, this meaning was extended to include concepts of sin and impurity,<ref name="JWA"/><ref name="Sigvartsen2017"/><ref name="Wasserfall1999"/> which may be related to ancient attitudes towards menstruation.<ref name="JWA"/>

Literally, the feminine noun ''niddah'' means ''moved'' (i.e., ''separated''), and generally refers to separation due to [[tumah and taharah|ritual impurity]].<ref name="Jewish">Jacobs, Joseph and Judah David Eisenstein (1906). "[http://www.jewishencyclopedia.com/articles/12621-red-heifer Red Heifer]", ''Jewish Encyclopedia''.</ref> Medieval Biblical commentator [[Abraham ibn Ezra]] writes that the word ''niddah'' is related to the term ''menadechem'' ({{Script/Hebrew|מנדיכם}}), meaning ''those that cast you out''.<ref name="Jewish"/>

=== Hebrew Bible ===
The noun ''niddah'' occurs 25 times in the [[Masoretic Text]] of the [[Hebrew Bible]]. The majority of these uses refer to forms of uncleanliness in Leviticus. For example, in Leviticus, if a man takes his brother's wife, then that is "uncleanness", ''niddah.'' The five uses in Numbers all concern the [[red heifer]] ceremony ({{Tanakhverse|Numbers|19:1}}) and use the phrase ''mei niddah'', "waters of separation".<ref>[[G. Johannes Botterweck|Botterweck]], ''et al''. (1999), p. 163 (vol. 4)</ref> {{Tanakhverse|2 Chronicles|29:5}} includes a single exhortation of [[Hezekiah]] to the Levites, to carry forth the ''niddah'' (translated: "filthiness"), possibly idols of his father [[Ahaz]], out of the [[temple in Jerusalem]].<ref>David L. Petersen ''Late Israelite prophecy: studies in deutero-prophetic literature''   {{ISBN|0891300767}}. 1977 "The final product, 2 Chronicles 29, represents more than just a simple description of Hezekiah's temple rededication; ... Levites dovetails so neatly with the narrative's description of what they did: the carrying of the tumah/niddah."</ref> Usage in Ezekiel follows that of Leviticus. Finally, the [[Book of Zechariah]] concludes with an [[eschatology|eschatological]] reference to washing Jerusalem:<ref>Klein, ''et al.'' (2008), p. 373.</ref> "In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem for sin (''ḥaṭ'at'') and for uncleanness (''niddah'')" ({{Tanakhverse|Zechariah|13:1}}).

=== Rabbinic injunctions ===
The copious laws of ''niddah'' contained in the Jewish rabbinic writings are almost entirely made-up of "fences" ({{langx|he|סייגים}}), or safeguards, built around the [[Torah]]. The general rule which applies is that a woman is clean from the standpoint of the Torah until she feels uterine blood discharge from its source within her body. However, the rabbis have declared a woman to be unclean although she has not felt any discharge of blood, but has merely seen either a red or black blood stain on her body,<ref>Knohl (2014), p. 159</ref> or on her white garment or sheet, and which blood stain is larger in diameter than a [[fava bean]] (about 20&nbsp;mm), in which case she must separate herself from her husband until she can complete seven clean days and can be purified in a ritual bath ([[mikveh]]).<ref name= "Teherani2019">Teherani (2019), p. 6 (chapter 2)</ref> A blood stain that is a dark brown color leaning towards the color of coffee and the color of chestnuts defiles a woman and renders her ''niddah'', on the condition that she feels its discharge. However, if she saw the same color while checking herself with an inspection cloth, but had not felt any discharge of blood, she is clean.<ref name="Teherani 2019, p. 24 chapter 3">Teherani (2019), p. 24 (chapter 3)</ref><ref>Scientifically, the brown colorization found in the spotting of white panties is often the result of period blood being trapped in the vagina and its exposure to the vagina's acidic environment (lactic acid), causing the oxidation, or chemical break-down, of the blood. See Obstetrician-Gynecologist/Physician [[Danielle Jones (physician)|Danielle Jones]], MD FACOG, {{YouTube|KIxg2zxg1CQ|5 "Strange" Things Your Vagina Does That Are NORMAL}}, educational information video / May 2021, minutes 3:52–4:34.</ref> Conversely, a vaginal discharge that is white in color, or either light yellow, green or blueish in color, does not render the woman ''niddah''.<ref name="Teherani 2019, p. 24 chapter 3"/> There are, yet, many other conditions that need to be met, by rabbinic ordinances, in order to render uncleanness to a blood stain.<ref name= "Teherani2019" />
<blockquote>The daughters of Israel have behaved stringently with themselves, insofar that even if they should see a drop of blood as a mustard grain, they would wait over it seven days of cleanness<ref>[[Babylonian Talmud]] (''[[Berakhot (tractate)|Berakhot]]'' 31<sup>a</sup>)</ref><ref>[[Maimonides]] (1974), ''Hil. Issurei Bi'ah'' 11:3–4</ref></blockquote>

Although the Written Law ({{Tanakhverse|Leviticus|15:25-28}}) explicitly enjoins women to count seven days of cleanness (see ''[[#Ritual purity aspect|infra]]'') when they have seen [[Zavah|irregular blood sightings]] (the irregularity occurring only from the eighth day of the start of her regular period and ending with the conclusion of the eighteenth day<ref>[[Maimonides]], [[Mishne Torah]] (''Hil. Issurei Bi'ah'' 6:1–5)</ref>), the [[Chazal|Sages of Israel]] have required all women who have experienced even their regular and natural purgation to count seven days of cleanness before they can be purified.<ref>[[Babylonian Talmud]] (''[[Berakhot (tractate)|Berakhot]]'' 31<sup>a</sup>, [[Rashi]] s.v. {{Script/Hebrew|יושבת עליה ז' נקיים}})</ref>

== Application of the Torah ==
The Leviticus description of ''niddah'' is essentially composed of two parts: the ritual purity (''[[tumah and taharah]]'') aspect ''and'' the prohibition of sexual intercourse aspect.<ref>''Tshuvath Ha[[Maimonides|Rambam]]'' (as quoted in ''Igrot Kodesh'' vol. 3 p. 374)</ref>

=== Ritual purity aspect ===
{{Main|Tumah and taharah}}

The Biblical regulations of Leviticus specify that a menstruating woman must "separate" for seven days ({{Tanakhverse|Leviticus|15:19}}). Any object she sits on or lies upon during this period is becomes a "carrier of tumah" (''[[midras uncleanness]]''). One who comes into contact with her ''midras,'' or her, during this period becomes ritually impure ({{Tanakhverse|Leviticus|15:19-23}}) In addition, a man who has sexual relations with her is rendered ritually impure for seven days—as opposed to one day of impurity for coming into contact with her or her ''midras'' ({{Tanakhverse|Leviticus|15:24}}).

During a woman's menstrual cycle, she is still permitted to cook and bake for her husband, and to separate the [[Dough portion|dough-portion]] (Challah), but is restricted from arranging her husband's bed linen in his presence, from mingling his cup of wine with water, and from washing her husband's face, feet and hands, since these actions are thought to arouse affection.<ref name="IsaacNarbonne">{{cite book|last=Ben Isaac of Narbonne|first=Abraham|author-link=Abraham ben Isaac of Narbonne|title=Responsa of R. Abraham ben Isaac of Narbonne
|editor=Yosef Qafih |publisher=Magen |year=1962 |location=Jerusalem |url=https://www.nli.org.il/he/books/NNL_ALEPH001089077/NLI |language=he |pages=69, 98 |oclc=232953513}} (''responsum'' no. 90)</ref> A niddah is also prohibited from passing objects directly unto her husband, from hand to hand, a rabbinic safeguard made to avoid physical contact, as it is prohibited unto the man to touch his wife during these days.<ref name="IsaacNarbonne"/>

While the purity laws still exist in theory, in modern times there is generally no practical consequence to becoming impure (as, e.g., the [[Temple in Jerusalem]] cannot be visited), so the laws have no practical expression.

Some later rabbinic authorities encouraged (but did not require) avoiding the ''midras'' of the ''niddah'', as a remembrance for diasporic Jews so as to not forget the purity laws.<ref>''[[Isaiah Horowitz|Shelah]]'', vol. 1 p. 452, Pitchei Harakanti ([[Menahem Recanati]]) Chap. 586, Teshuvat Ha[[Isaac Alfasi|Rif]] Chap. 297</ref> This encouragement was only for the biblically prescribed seven-day period, not for the  latter days that were added as part of certain [[Rabbi Zeira's stringency|rabbinical stringencies]]. The [[Chabad|Lubavitcher]] rabbi [[Menachem Mendel Schneerson]] discouraged abstaining from the ''midras'' of a ''niddah'' in modern times.<ref>With the exception for unique individuals - ''[[Igrot Kodesh]]'' vol. 3 p. 374</ref>

=== Sexual relations ===
Leviticus further prohibits sexual intercourse with a woman who is in her ''niddah'' state. "And to a woman in her (state of) ''niddah'' impurity you should not come close (with intent to) reveal her nudity" ({{Tanakhverse|Leviticus|18:19}}).

The Torah concludes by imposing the punishment of ''[[kareth]]'' on both individuals (man and woman) if the prohibition is violated ({{Tanakhverse|Leviticus|20:18}}) This ''issur'' (prohibition) component of physical relations with the ''niddah'' is considered in full effect and mandatory for all children of Israel.

== Practical laws ==
=== Terms and definitions ===
* ''Niddah'', a woman who had become impure as a result of menstruation. 
* ''[[Zavah]]'', a woman who had become impure by a bloody uterine emission, deemed abnormal, in the sense that the emission had occurred during the timeframe of the 8th - 18th day, counting from the start of her last menstruation 
* ''[[Mikveh]]'', a ritual bath for immersion after the ''niddah'' period has ended.
* ''Vestot'', days during which the woman is likely to see her menstrual flow
** ''Onah Benonit'', the 30th day after the beginning of previous menstruation
** ''Veset HaChodesh'', the same day of the Jewish month on which began the previous menstruation
** ''Veset HaFlagah'', the days (or half-days, per Chabad minhag) between menstruation
* ''Bedikah'', cloth with which to check whether menstrual blood has finished
* ''Ben niddah'' (male) or ''bat niddah'' (female), a person conceived when their mother was ''niddah''

=== Start of menstruation ===
According to rabbinical law, a woman becomes a ''niddah'' when she is aware that [[blood]] has come from her [[womb]], whether it is due to menstruation, [[childbirth]], [[sexually transmitted disease]], or other reasons.<ref>Cohen, A. (1984)</ref> If menstruation began before she sees evidence of it, the rabbinic regulations regard her as not being ''niddah'' until she notices. Until this point, the regulations do not come into force.

It is not necessary for the woman to witness the flow of blood itself; it is sufficient for her to notice a stain that has indications of having originated in her womb; bloodstains alone are inadequate without such evidence, for example, if she finds a stain just after cutting her finger, she does not become a ''niddah'', as the blood is not obviously uterine. If she notices a bloodstain of uncertain origin, for example on her underclothing, there are a series of complicated criteria used by rabbinical law to determine whether she is ''niddah'' or not; the woman herself is not expected to know these criteria, and must seek the assistance of a [[rabbi]].<ref>{{Cite book |title=Rose of the Valley |author=Rahamim Shaul Sultan |publisher=Feldheim |page=50 |quote=Since the laws of ketamin are very broad and intricate, and numerous factors need to be taken into account, one should always seek the advice of a rabbi who specializes in the laws of nidah whenever a ketem is found}}</ref>

=== Duration of ''niddah'' status ===

According to the Torah, the ''niddah'' period is 7 days; however, in Ashkenazi communities, the Rabbis added a stringency increasing the minimum duration period to 12 days.<ref name="Werczberger2020"/><ref name="Liss2015"/><ref>
{{cite book |last1=Goldin |first1=Simha |title=Jewish Women in Europe in the Middle Ages: A quiet revolution |date=3 January 2020 |publisher=Manchester University Press |isbn=978-1-5261-4827-8 |page=220n78 |url=https://books.google.com/books?id=2XICEAAAQBAJ&pg=PA220}}
</ref><ref>
{{cite book |last1=Wasserfall |first1=Rahel |title=Women and Water: Menstruation in Jewish Life and Law |date=2015 |publisher=Brandeis University Press |isbn=978-1-61168-870-2 |page=102 |url=https://books.google.com/books?id=QyczCwAAQBAJ&pg=PA102}}</ref> (See section "Seven days of cleanness" for differences in custom).

The Biblical definition of ''niddah'' is any blood emission occurring within seven days from the beginning of the menstrual period. After this seven-day period, the woman may immerse in the [[mikveh]] immediately (if she has stopped menstruating). Any blood found after these seven days is considered abnormal (''zavah'') blood and is subject to more stringent requirements, depending on the duration of said abnormal blood flow.

In the days of the [[Amoraim]], because of possible confusion in determining when menstruation began and ended and hence whether blood was normal menstrual (''niddah'') or abnormal (''zavah'') blood, it became the accepted practice and practical halacha, that all women treat any emission as a continued abnormal flow (''zavah gedolah''—זבה גדולה), which requires counting seven abnormal-discharge-free days from the end of menstruation. This lengthening of the ''niddah'' period is known as [[Rabbi Zeira's stringency]].<ref>The original [[Torah]] instruction was that a woman may immerse herself immediately following the cessation of blood discharge. Seven days are given to all women during their regular monthly menstrual cycle, known as the "days of the menstruate" ([[Hebrew]]: ''niddah''), even if her actual period lasted only 3 to 5 days. Only with the woman who had an "irregular flow" (Heb. ''zivah'') was she required to count seven days of cleanness when her menstrual flow ceased ({{Tanakhverse|Leviticus|15:25-28}}). The "irregular flow" (Heb. ''zivah'') was determined in the following manner:  From the eighth day after the beginning of her period (the ''[[terminus post quem]]'', or the earliest date in which they begin to reckon the case of a ''zavah''), when she should have normally concluded her period, these are days that are known in Hebrew as the days of a running issue (Hebrew: ''zivah''), and which simply defines a time (from the 8th to the 18th day, for a total of eleven days) that, if the woman had an irregular flow of blood for two consecutive days during this time, she becomes a ''zavah'' and is capable of defiling whatever she touches, and especially whatever object she happens to be standing upon, lying upon or sitting upon. Because of the complexities in determining these days in most women, especially with those who do not have fixed periods, the Sages of Israel declared that all menstruant women are to be viewed in such a doubtful condition, regardless of when they saw blood, requiring them all to count seven days of cleanness before their immersion. See: [[Jerusalem Talmud]] (''Berakhoth'' 37a [5:1]). Explained by [[Maimonides]] in his ''[[Mishne Torah]]'' (Hil. ''Issurei Bi'ah'' 6:1–5)</ref> According to contemporary Halacha these "seven clean days" must be observed.

===Practices during ''niddah''===
In the Orthodox Jewish community, women may test whether menstruation has ceased; this ritual is known as the ''[[hefsek taharah]]''. The woman takes a bath or shower near sunset, wraps a special [[cloth]] around her finger, and swipes the [[vagina]]l circumference. If the cloth shows only discharges that are white, yellow, or clear, then menstruation is considered to have ceased. If the discharge is red or pink, it indicates that menstruation continues. If it is any other color, like brown, it is subject to further inquiry, often involving consultation with a rabbi. The ritual requires that the cloth used to perform this test is first checked carefully to ensure that it is clean of any marks, colored threads, or specks; the cloth itself can be any clean white cloth, although there are small cloths designed for this ritual known as bedikah cloths, meaning "checking".

In the Orthodox Jewish community, further rituals are practiced toward assurance regarding the cessation of the menstrual flow. After the ''hefsek taharah'', some women insert a cloth (or, in modern times, a [[tampon]]), consequently known as a ''moch dachuk'', for between 18 minutes and an hour, to ensure that there is no blood; this must be done carefully, as it could otherwise irritate the [[mucous membrane]], causing bleeding unrelated to menstruation. If there is any fear of irritation causing bleeding, a rabbi may waive this practice.

The "bedikah" is repeated each morning and evening of the seven days after the end of menstruation. Another tradition is the wearing of white underwear and use of white bedding during this period; conversely, the rest of the time, when not counting the "seven clean days", some women who suffer from [[metrorrhagia|spotting]] deliberately use coloured underwear and colored toilet paper, since it is only when blood is seen on white material that it has any legal status in Jewish law. When not during their seven "clean" days, all women are advised to wear colored undergarments, for this reason.  It is furthermore strongly recommended that women make an effort to refrain from looking at the toilet paper after wiping to avoid possible resultant questions.

=== Physical contact during ''niddah'' ===
[[File:בקתת נידה בכפר אמבובר 1976.jpg|thumbnail|A niddah hut (Mergem Gogo) at the Jewish village of [[Ambober]] in northern Ethiopia, 1976.]]
As with most [[forbidden relationships in Judaism]], all physical contact in an affectionate or lustful manner is rabbinically forbidden when a woman is in her ''niddah'' status.<ref>There is a dispute as to whether this prohibition is biblical or rabbinic. See [[Negiah]]; see also ''Badei HaShulchan'' 195:14.</ref><ref>There are additional restrictions in the time of the Holy Temple because of the Biblical concept of [[Tamei|Tumah]].</ref> Such contact is forbidden whether or not the man and woman are husband and wife.<ref>Remah Yoreh Deah 183:1; see Shiurei Shevet HaLeivi 183:7</ref>

In the case of husband and wife, however, the sages added on extra restrictions, including touch that is not in an affectionate or lustful manner,<ref>When the wife is a ''niddah'', touch between spouses that is not ''Derech Chiba v'Taavah'' is only prohibited rabbinically according to some authorities, although most rabbis disagree, prohibiting all forms of intimacy where physical touching is involved. See ''Badei HaShulchan'' 195:14.</ref> passing of objects even without touching, and sleeping in the same bed; these restrictions are to avoid the risk of leading to sexual contact.<ref>[[Shulhan Arukh]] (''Yoreh De'ah'' 195)</ref> These laws are termed ''harchakot'', meaning "the laws of separation," and imply the prohibitive rules regulating the passing of objects from hand to hand, as well as to taking distinctive measures used to remind them of their separation, such as placing some object at the dinner table which is not ordinarily placed there.<ref name="Knohl2014">Knohl (2014), pp. 163–173 (chapter 7)</ref> The laws of separation (''harchakot'') are derived from a biblical command: "You shall not approach a woman to uncover her nakedness so long as she is separated for her [menstrual] uncleanness" ({{Tanakhverse|Leviticus|18:19}}).<ref name="Knohl2014"/> Some have suggested that by physically distancing oneself from his spouse there is an enhanced need for relationships to develop in non-physical ways, such as emotional and spiritual connections.



=== Seven days of cleanness ===
When blood from a menstruant (''niddah'') has ceased altogether, shortly before sunset she performs on herself a "cessation of uncleanness", known by its Hebrew [[euphemism]] ''hefseq be-ṭaharah'' ({{Script/Hebrew|הפסק בטהרה}} = lit. "cessation of purification"), during which time she checks herself to verify that all uterine bleeding has indeed stopped. This is done by bathing,<ref>Teherani (2019), p. 104, section 1, citing [[Ovadia Yosef|Yosef, O.]] (2018), vol. 2. p. 292.</ref> and, afterwards, inserting a clean piece of white cotton or linen cloth within her vagina and examining it after swiping the area inside, followed by leaving in that place a snugly fitting cotton wad for the duration of about 20 minutes (preferably during the evening twilight).<ref>Teherani (2019), p. 109, section 24, citing the [[Shulhan Arukh]] (''[[Yoreh De'ah]]'' 196:1).</ref> When there are no signs of blood, the woman begins counting seven days of cleanness on the following day,<ref>Teherani (2019), p. 113, section 1, citing the [[Shulhan Arukh]] (''[[Yoreh De'ah]]'' 196:1).</ref> during which seven days she is still prohibited to have any physical contact with her husband.<ref>Knohl (2014), p. 90</ref><ref>[[Yisrael Meir Kagan|Yisrael Meir]] (1971), p. 71</ref> During each of the seven days, the woman checks herself once in the morning and once in the evening, by using a soft and white, absorbent cotton cloth.<ref>Teharani (2019), p. 113, section 2, citing [[Ovadia Yosef|Yosef, O.]] (2018), vol. 2, p. 301.</ref><ref>Teharani (2019), p. 118, section 29, citing [[Ovadia Yosef|Yosef, O.]] (2018), vol. 2, p. 338.</ref>

In Sephardic Jewish tradition, a woman who has had no physical contact with her husband within the 72 hr. period (3 days) prior to the start of her menstruation, she is permitted to immediately conduct the ''hefseq be-ṭaharah'' (see ''supra'') after all uterine bleeding has stopped, and, on the following day, she begins to count seven days of cleanness, which culminate in an immersion. Differences in custom, however, exist between the [[Ashkenazim]] and the [[Sephardic]] Jewish communities as to when to begin the counting of seven days of cleanness if she cohabited with her husband within those 72 hours (three days) prior to her seeing blood.    
*'''Ashkenazim:''' According to the halachic ruling of [[Moses Isserles]], in all cases, whether a woman cohabited with her husband within the past 72 hours or did not cohabit with her husband, whether the woman saw blood for only 2 or 3 days, or merely a blood stain, she does not begin to count seven days of cleanness until 5 days have passed from the time that she ceased seeing blood, and only then does she proceed to count seven days of cleanness.<ref name="Badihi2011">Badiḥi (2011), p. 165 (''responsum'' no. 41).</ref> For example, if she ceased to see blood on a Sunday, she can begin her ''hefseq be-ṭaharah'' (see ''[[#Practices during niddah|supra]]'') on a Thursday, and then on a Friday to start her first day of seven days of cleanness.<ref>[[Yisrael Meir Kagan|Yisrael Meir]] (1971), p. 72–74</ref> These days are not to be interrupted by any blood sighting in-between, and after concluding these seven clean days, she immerses herself in a ritual bath (''[[mikveh]]'') on that coming night.<ref name="KnohlE2014">Knohl (2014), pp. 104–105</ref> At this time she is no longer a menstruant, but is deemed clean, and she is permitted unto her husband.
*'''Sephardic Jews:''' For Jews that largely hail from [[North Africa]], [[Spain]], [[Turkey]], and the [[Middle East]] (including [[Iran]]), they will usually follow the practice of the [[Shulhan Arukh]], which is to wait 4 days from the time the couple last cohabited together (i.e. last time in which they engaged in sexual intercourse) before she begins to count seven days of cleanness. This will allow for the discharge of semen from her body that is suspected of having been mixed with the blood of her menstruation.<ref>Teherani (2019), p. 121, section 44, citing the [[Shulhan Arukh]] (''[[Yoreh De'ah]]'' 196:11).</ref> For example, if the couple last cohabited on a Saturday, and she then saw blood on a Sunday, she can begin her ''hefseq be-ṭaharah'' (see ''supra'') on a Tuesday (on the condition that all blood has stopped), and then on a Wednesday to start her first day of seven days of cleanness.<ref name="KnohlE2014"/><ref>Teherani (2019), p. 121, section 44, brings down a different example, having the same import. If she cohabited with her husband on Sunday night, she performs the ''hefseq be-ṭaharah'' on Thursday, shortly before sunset, and then on Friday she begins the 1st day of counting 7 days of cleanness, which she then concludes on Thursday of the following week. On that same Thursday night she immerses in the ''mikveh''.</ref> These days are not to be interrupted by any blood sighting in-between, and after concluding these seven clean days, she immerses herself in a ritual bath (''[[mikveh]]'') on that coming night. At this time she is no longer a menstruant, but is deemed clean, and she is permitted unto her husband.

For the Sephardic Jewish community, waiting four days before beginning to count seven days of cleanness only refers to when there were conjugal affairs between a man and his wife, leading up to her menstrual period. If, however, there was no sexual intercourse between the couple in the days leading up to her menstrual cycle, and, subsequently, there was no fear of her body discharging of her husband's copulative seed that had been mixed with her menstrual blood, there is no need for her to wait four days, but she may presently begin her ''hefseq be-ṭaharah'' (see ''[[#Practices during niddah|supra]]''), followed by counting seven days of cleanness.<ref>Teherani (2019), p. 121, section 45, citing the [[Shulhan Arukh]] (''[[Yoreh De'ah]]'' 196:11).</ref> Another factor used to determine when to begin the counting of seven clean days (among Sephardic Jews) is that, had the woman merely found on her an unclean blood stain (where there was no sensation of any active blood flow), after concluding that all such sightings have stopped, she can begin to count seven days of cleanness after two days have passed since the last time she cohabited with her husband.<ref>Teherani (2019), p. 122, section 49, citing [[Ovadia Yosef|Yosef, O.]] (2018), vol. 2, p. 427.</ref> However, among Ashkenazim, even if a woman merely saw an unclean blood stain, when the blood has ceased to appear, she waits 5 days before beginning to count her seven days of cleanness.<ref name="Badihi2011"/>

[[Maimonides]] mentions a former custom where the menstruants of some Jewish communities would wait a standard 7 days before beginning to count seven days of cleanness, even if the woman had seen blood for only one or two days.<ref name="Rambam"/><ref>Compare the medieval homiletic work, [[Midrash Tanhuma|Midrash Tanḥuma]], ''Parashat Metzora'', end of section 7, which is perhaps the source for this custom.</ref> This custom, though widely practised in the 20th century among the [[Jews of Yemen]],<ref name="Ratsabi1992">[[:he:יצחק רצאבי|Ratsabi]] (1992), p. 46</ref><ref>Badiḥi (2011), pp. 169–170 (''responsum'' no. 41). According to Badihi, there were actually three customs practised in Yemen. Some followed the ruling of Rabbi [[Moses Isserles]] and waited 5 days before proceeding to count seven days of cleanness, while others waited 7 days before they began to count seven days of cleanness, and, yet, others (who had not cohabited with their husbands in the past 72 hours) would inspect themselves when all bleeding had stopped and then, on the next day, begin to count seven days of cleanness.</ref> [[Djerba]],<ref name="Ratsabi1992"/> parts of [[Morocco]],<ref name="Ratsabi1992"/> as also with a few families in [[Baghdad]],<ref name="Ratsabi1992"/> was later rejected and abandoned by many, as Maimonides calls it an errant practice.<ref name="Rambam">[[Maimonides]] (1974), ''Hil. Issurei Bi'ah'' 11:14</ref>

=== Niddah and fertility ===

Because the night that the woman ritually traditionally immerses is about 12 days after menstruation began, it often coincides with a woman's [[ovulation]], and thus improves the chances of successful [[Conception (biology)|conception]] if sexual relations occur on that night. However, for certain women, this period extends far past the date of ovulation, and in combination with the ban on sexual relations during the ''niddah'' state, effectively results in the woman being unable to conceive,<ref>Evyatar Marienberg, "[http://www.unc.edu/~evyatarm/ahp/chez/Marienberg_HTR-2013_Traditional_Sexual_Practices_and_Their_Possible_Impact_on_Jewish_Fertility_and_Demography.pdf Traditional Jewish Sexual Practices and Their Possible Impact on Jewish Fertility and Demography]," Harvard Theological Review 106:3 (2013) 243-286</ref> a situation sometimes called "halachic infertility".<ref>Ivry (2013), pp. 208–226</ref>  In the case of this effective infertility, rabbis try on a case-by-case basis to relax halakhic strictures in order to facilitate conception. There have been some calls within Orthodox Judaism for the custom to be modified so that the time between the end of menstruation and the end of ''niddah'' is shorter for these women.<ref>{{cite web|url=http://www.haaretz.com/hasen/spages/798797.html|title=Haaretz Newspaper, "Be pure or be fruitful" December 15, 2006|website=haaretz.com|access-date=17 March 2018}}</ref> Another suggestion is to take hormone tablets to lengthen the ovulation cycle.<ref>[[Moshe Sternbuch|Sternbuch]] (1992–1997), vol. 4</ref>

=== Checking by bedikah ===
The ''bedikah'' cloth or "checking cloth", called an ''eid'' ["witness"] in Hebrew, is a clean piece of white cloth used in the process of purifying a ''niddah''. It is used by observant Jewish women to determine whether they have finished [[menstruation]]. The cloth is inserted into the [[vagina]], and if no blood is found, the woman may start counting the seven blood-free days. On each of these days, she performs this examination in the morning and in the later afternoon before sunset. If no blood is found, she may go to the ''[[mikveh]]'' on the eighth evening after nightfall, and then engage in intercourse with her husband.<ref>[[Mishneh Torah]] ''Kedushah'' Laws of forbidden relations 4:6</ref> Such cloths are about two by four inches, and are available at local Judaica stores, the local mikveh, stores in Orthodox neighborhoods in Israel, or may be cut from clean all-white soft cotton or linen fabric.<ref>[[Mishneh Torah]] ''Kedushah'' Laws of forbidden relations 4:15</ref>

This practice is also occasionally used by Jewish men to check if he has gotten blood on himself from his wife after intercourse to determine whether she menstruated during intercourse.<ref>[[Mishneh Torah]], Hilchot Issurei Biah 4:14</ref>

=== Immersion in water ===
{{Main|Mikveh}}
After a woman has counted seven days of cleanness (see ''supra''), she is then required to immerse in a ritual bath (''[[mikveh]]'') that has been constructed in accordance with the Jewish laws of ritual purity. After concluding her seven days of cleanness, she is not allowed to immerse during the daytime, even on the eighth or ninth days, because of a rule introduced on account of her daughter's immersion ({{langx|he|סרך בתה}}) and which was enacted for the sake of conformity, so that the daughter will not see her mother immerse during the daytime and wrongly presume that it was her mother's seventh day of counting, and think that it was alright to immerse on the seventh day before nightfall, without realizing that her mother had already concluded her seven clean days. This enactment, therefore, was to prevent an occasion for miscalculation and stumbling. Even if a woman has no daughter, this rule of immersing only in the night still applies, as the [[Chazal|Sages]] did not make any distinction, but have prohibited all women from immersing themselves during daylight hours of the eighth day, or of any day.<ref>Teherani (2019), p. 126 (chapter 14, section 13), citing [[Shulhan Arukh]] (''Yoreh De'ah'' 197:3); ''Taharat ha-Bayt'' (vol. 2, p. 597).</ref> Under extenuating circumstances, however, the rabbis have also permitted to immerse in the day, after fully completing seven days of cleanness.

There are differing customs about how many immersions are performed at each visit to a ''mikveh''. It is the custom of many in the Orthodox community to immerse at least twice.<ref>[[Shulhan Arukh]] (''Yoreh De'ah'' 200)</ref> Accordingly, they would immerse, recite the blessing, then immerse again. The other opinion states that like other commandments, here too the blessing should be recited before performing the commandment.<ref>[[Fishel Jacobs|Jacobs, F.]] (2000), chapter 10</ref>

Immediate preparation for a ''mikveh'' includes a bath or shower wherein every part of the body (including the ears and underneath the nails) is thoroughly washed; plus other routine hygiene practices which include trimming fingernails and toenails, brushing and flossing the teeth, and combing the hair. Prior to every immersion, the woman is required to inspect herself to make sure that there is nothing clinging to her skin and hair that would obstruct the water from making contact with it during her actual immersion, or what is known as ''ḥaṣīṣah'' = "interposing objects" (e.g. clay, dough, paint, gum resin, etc.).<ref>[[Shulhan Arukh]] (''Yoreh De'ah'' 199:5)</ref> At the ''mikveh'' itself, a female attendant is present to make certain that the woman immerses herself fully, including her hairs. Though that is the attendant's foremost duty, she may also help by checking a woman's back or answer questions regarding proper ritual protocol.

=== Refrainment from relations on days that menstruation is expected to begin ===
The classical regulations also forbid sexual relations on the day that a woman expects to start menstruating.<ref>Yoreh Deah 184:2</ref> Generally speaking, there are three days that fall under this regulation, known as the ''veset'', namely the same day of the month, (according to the [[Hebrew calendar]]), as her previous menstruation began; the day exactly 30 days after the previous menstruation started; and the day that is of equal distance from the day of her previous menstruation as the menstruation before the last.<ref>[[Shulhan Arukh]] (''Yoreh De'ah'' 189:1-2)</ref> For instance: If the interval between her last two periods was 28 days - the couple must refrain from sexual relations on the 28th day. According to most Orthodox authorities, this is measured from the beginning of the former period to the beginning of the latter. Yet some authorities, especially in Chabbad circles, rule that this is measured from the end of the preceding menstruation to the beginning of the following one.<ref>''Shulchan Aruch HaRav, Yoreh De'ah'' 184:22.</ref>

If the woman is not actually menstruating during a ''veset'' day, then there are certain circumstances wherein sexual activity is permitted according to most authorities, for example, if a woman's husband is about to travel, and will return only after menstruation has begun.<ref>[[Shulhan Arukh]] (''Yoreh De'ah'' 184:10)</ref>

=== Newlyweds ===
According to all Orthodox authorities, the first time a virgin has intercourse, she also becomes ''niddah'' as a result of her hymenal blood flow ({{langx|he|דם בתולים|translit=dam betulim|lit=virginal blood}}). However, a bride observes only four days of ''hefsek taharah'' ({{langx|he|הפסק טהרה|lit=pause of purity}}), instead of the usual five.<ref>[[Shulhan Arukh]] (''Yoreh De'ah'' 196:11); ''[[Turei Zahav]]'', ibid. 5.</ref> The woman performs ''hefsek taharah'' by checking to make sure that all bleeding has stopped by inserting a piece of white cloth into her vagina and having it come out free of blood, in order to begin on the following day her seven days of cleanness. Traditionally, this pause is observed even if no blood is discovered, though some Conservative authorities have ruled that a woman is not a ''niddah'' in such a case unless bleeding is observed.<ref name="Berkowitz2006">
{{cite web |last1=Berkowitz |first1=Miriam |title=Reshaping the Laws of Family Purity for the Modern World |url=https://www.rabbinicalassembly.org/sites/default/files/public/halakhah/teshuvot/20052010/berkowitz_niddah.pdf |website=The Rabbinical Assembly |date=2006}}</ref>

=== Privacy of the niddah process ===
{{Main|Tzniut}}

Out of ''[[tzniut]]'' (Hebrew for "modesty"), many Orthodox Jews and some Conservative Jews follow a custom of keeping their times of ''niddah'' secret from the general public.<ref>Teherani (2019), p. 157 (chapter 17, section 22).</ref>

== Conservative Judaism ==
[[Conservative Judaism]] authorities teach that the laws of family purity are normative and still in force, including the requirement to refrain from sexual relations during ''niddah'', yet there is a difference of opinions over how much other strictures need to be observed, such as whether there should be complete prohibition on any touching during ''niddah'' and whether women are required to count seven "clean" days before immersing in the ''mikveh''.

The majority of orthodox rabbis contend that the seven days of cleanness still apply to all menstruant women today, even though it is only a rabbinic injunction.<ref>Knohl (2014), pp. 102–111 (chapter 2)</ref><ref>Teherani (2019), p. 113–124 (chapter 13)</ref><ref>[[Ovadia Yosef|Yosef, Ovadiah]] (2018), vol. 2, pp. 301–ff.</ref><ref>[[Ovadia Yosef|Yosef, Ovadiah]] (1986–1995), vol. 5, ''Yoreh De'ah'', sec. 16</ref> According to two lesser opinions representing the movement of Conservative Judaism, one by Grossman and the other by Reisner, whose views are not shared by orthodox Jewish circles, the "seven clean days" need not be observed today and women may immerse and resume sexual relations after seven days from the beginning of menstruation, or after its cessation, if it lasts longer than seven days. Grossman and Berkowitz ruled that women may rely on their own discretion about when menstruation has ended, and need not routinely engage in ''bedikah'' as described above.<ref name="RabbiGrossman">Susan Grossman, [http://www.rabbinicalassembly.org/sites/default/files/public/halakhah/teshuvot/20052010/grossman_niddah.pdf Mikveh and the Sanctity of Being Created Human], Committee on Jewish Law and Standards, Rabbinical Assembly, December 6, 2006]</ref><ref name="RabbiReisner">Reisner (2006).</ref><ref name="RabbiBerkowitz">Miriam Berkowitz, [http://www.rabbinicalassembly.org/sites/default/files/public/halakhah/teshuvot/20052010/berkowitz_niddah.pdf Reshaping the Laws of Family Purity for the Modern World], Committee on Jewish Law and Standards, Rabbinical Assembly, December 6, 2006]</ref>

Despite the official stance, the practices related to family purity have often not been widely followed by Conservative Jews. However, in an issue of the ''United Synagogue Review'' that focused on issues of ''mikvah'' and ''niddah'' (published in conjunction with the passing of the responsa mentioned above, in Fall/Winter 2006), Rabbi Myron S. Geller, a member of the Committee on Jewish Law and Standards, wrote about an upswing in the observance of the laws of family purity within the Conservative Jewish community:<ref>[http://www.uscj.org/Aboutus/Publications/CJ_VoicesofConservative_MasortiJudaism/Archive/default.aspx Archive of United Synagogue Review], text on Interfaithfamily.com [http://www.interfaithfamily.com/spirituality/conversion/Sanctifying_Waters_The_Mikvah_and_Conservative_Judaism.shtml Sanctifying Waters: The Mikvah and Conservative Judaism], retrieved 12-30-2011</ref>

Conservative Judaism has largely ignored this practice in the past, but recently has begun to reevaluate its silence in this area and to consider the spiritual implications of mikvah immersion for human sexuality and for women.{{Citation needed|date=January 2020}}

== Reform Judaism ==
[[Reform Judaism]] and other liberal denominations have largely rejected many of the rituals and prohibitions associated with menstruation, particularly the use of a ''mikveh''.<ref name="JWA" />

== See also ==
{{Portal|Judaism}}
* [[Culture and menstruation]]
* [[Jewish views on marriage]]
* [[Menstruation hut]]
* [[Mikveh Calendar]]
* [[Negiah]] (guidelines for physical contact)
* [[Niddah (Talmud)]]
* [[Role of women in Judaism]]
* [[Women in Judaism]]
* [[Yoetzet Halacha]]

== Further reading ==
*{{cite book |last=Kahana|first=K.|author-link=Kalman Kahana |title=Daughter of Israel - Laws of Family Purity (טהרת בת ישראל : הלכות נדה)|translator=Leonard Oschry |edition=3 |date=1970|publisher=Feldheim|location=Jerusalem - New York|page= |language=en|oclc=21284290}}

== References ==
{{Reflist}}

==Bibliography==
{{refbegin}}
*{{cite book|last=Badiḥi|first=Yiḥya|title=Ḥen Ṭov|editor=Yosef Ḥen |date=2011|publisher=Nosaḥ Teman|location=Bene Berak |pages=164–170 (responsum no. 41–beth)|language=he |oclc=768305430}}
*{{cite book |editor-last1=Botterweck |editor-first1=G Johannes |editor-link1=G. Johannes Botterweck |editor-last2=Ringgren  |editor-first2=Helmer |title=Theological Dictionary of the Old Testament |publisher=Wm. B. Eerdmans |volume=4 |date=1999|location=Grand Rapids, Mich. |oclc=838020993 }}
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*{{cite journal |last1=Ivry |first1=Tsipy |title=Halachic infertility: rabbis, doctors, and the struggle over professional boundaries |journal=Medical Anthropology |volume=32 |issue=3 |pages=208–226 |doi=10.1080/01459740.2012.674992 |pmid=23557006 |date=2013|s2cid=42649279 }}
*{{cite book |last=Jacobs |first=F.|author-link=Fishel Jacobs |title=Family Purity: A Guide to Marital Fulfillment |date=2000|publisher=Campus Living and Learning |location=South Royalton, Vt.|language=en |oclc=48004626 |isbn=9780967348193 }}
*{{cite book|last1=Klein|first1=George L.|last2=Clendenen |first2=Ray |title=Zechariah. New American Commentary|publisher=B & H Pub. Group |year=2008|location=Nashville, Tenn. |language=en|oclc=767571192 |isbn=978-0-8054-9494-5}} 
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*{{cite book |last=Maimonides |author-link=Maimonides |title=Sefer Mishneh Torah - HaYad Ha-Chazakah (Maimonides' Code of Jewish Law) |publisher=Pe'er HaTorah |volume=3 |date=1974|location=Jerusalem |language=he |oclc=122758200 |title-link=Mishne Torah }}, s.v. Hil. ''Issurei Bi'ah''
*{{cite journal |last=Marienberg |first=Evyatar  |author-link= |title=Traditional Jewish Sexual Practices and Their Possible Impact on Jewish Fertility and Demography|journal=[[Harvard Theological Review]] |volume=106 |issue=3 |date=2013|pages=243–286 |doi=10.1017/S0017816013000114 |s2cid=162725107 |url=http://www.unc.edu/~evyatarm/ahp/chez/Marienberg_HTR-2013_Traditional_Sexual_Practices_and_Their_Possible_Impact_on_Jewish_Fertility_and_Demography.pdf |language=en}}
*{{cite book |editor-last=Ratsabi |editor-first=Yitshak |editor-link=:he:יצחק רצאבי|title=Sefer Pisḳe Maharits (with the commentary Beʼerot Yitsḥaḳ) |contribution=Shaʻarei Ṭaharah|volume=3 |publisher=Mekhon Peʻulat tsadiḳ |date=1992 |location=Bnei Brak |language=he |oclc=30156998 }}, ''Hil. Niddah'' and ''Miqwa'ot''
* Reisner, Avram (2006), [http://www.rabbinicalassembly.org/sites/default/files/public/halakhah/teshuvot/20052010/reisner_niddah.pdf Observing Niddah in Our Day], [[Committee on Jewish Law and Standards]], Rabbinical Assembly
*{{cite book |last=Sternbuch |first=M. |author-link=Moshe Sternbuch |title=The Complete Responsa and Practices of Moshe Sternbuch [Teshuvos VeHanhagos] (שו"ת תשובות והנהגות השלם )|volume=4 |date=1992–1997|publisher=Sternbuch|location=Jerusalem |page= |language=he |oclc=762395952 }}
*{{cite book |author-last=Teherani |author-first=David |title=Sefer Ma'ayan Ṭaharah Hashalem (The Complete Book 'Wellspring of Purification') |edition=2 |publisher=Beit ha-hora'ah de-kahal kadosh sepharadim |location=Betar Ilit|year=2019 |page=|language=he|oclc=232673878 }}
*{{cite book |author=Yisrael Meir ha-Kohen |author-link=Yisrael Meir Kagan |title=Sefer Geder ʻOlam |contribution=Maʼamar ṭohorat ha-mishpaḥah |publisher=Sifrei Chofetz Chaim |location=Israel |year=1971|page=|language=he }} (reprinted in 1974 by Eshkol publishers, Jerusalem {{OCLC|816512380}})
*{{cite book |last=Yosef |first=O. |author-link=Ovadia Yosef|title=Responsa Yabia' Omer (Sefer Sheʼelot u-teshuvot Yabiʻa omer)|publisher=Meʼor Yiśraʼel|location=Jerusalem|year=1986–1995|volume=5 |language=he |oclc=503662216}}
*{{cite book |last=Yosef |first=O. |author-link=Ovadia Yosef|title=Sefer Ṭohorat ha-bayit |publisher=Meʼor Yiśraʼel|location=Jerusalem|year=2018|page= |volume=1-3 |language=he |oclc=20658501}} 
{{refend}}

== External links ==
* [https://web.archive.org/web/20120321192618/http://www.reutcenter.org/articles/Ner-David_Medieval_Responsa.pdf Medieval Responsa Literature on ''Niddah'': Perspectives of Notions of ''Tumah''] by [[Haviva Ner-David]].
* [https://web.archive.org/web/20120120021941/http://www.yoatzot.org/index.php Yoatzot.org], "The Women's Health and Halacha Website"
* Evyatar Marienberg, [http://www.unc.edu/~evyatarm/ahp/chez/Marienberg_HTR-2013_Traditional_Sexual_Practices_and_Their_Possible_Impact_on_Jewish_Fertility_and_Demography.pdf "Traditional Jewish Sexual Practices and Their Possible Impact on Jewish Fertility and Demography,"] Harvard Theological Review 106:3 (2013), pp.&nbsp;243–286
* Evyatar Marienberg, [https://www.youtube.com/watch?v=KpLtiScoj4c “What is Niddah? Menstruation in Judaism”], Polin: Museum of the History of Polish Jews, Warsaw, November 23, 2017

{{Halakha}}
{{Menstruation}}
{{Marital life in Judaism}}
{{Women in Judaism}}

[[Category:Jewish marital law]]
[[Category:Jewish ritual purity law]]
[[Category:Mishnah]]
[[Category:Talmud]]
[[Category:Menstruation in religion]]
[[Category:Judaism and sexuality]]
[[Category:Sex segregation and Judaism]]
[[Category:Jewish life cycle]]
[[Category:Hebrew words and phrases in Jewish law]]