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Halakhic texts relating to this article
Torah:Leviticus 15:19–30 18:19 20:18
Babylonian Talmud:Niddah
Mishneh Torah:Kedushah (Holiness): Issurei Biah (forbidden sexual relations): 4–11
Shulchan Aruch:Yoreh De'ah 183–202

Niddah (or nidah; Hebrew: נִדָּה‎), in traditional Judaism, describes a woman who has experienced bloody vaginal discharge (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.[1] 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.[2][3]

Since the late 19th century, with the influence of German Modern Orthodoxy, the laws concerning niddah are also referred to as taharat hamishpacha (טהרת המשפחה‎, Hebrew for family purity).

Etymology and usage

Literally, the feminine noun niddah means moved (i.e. separated), and generally refers to separation due to ritual impurity.[4] Medieval Biblical commentator Abraham ibn Ezra writes that the word niddah is related to the term menadechem (מנדיכם‎), meaning those that cast you out.[4]

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 take his brother's wife, then that is "uncleanness", niddah. The five uses in Numbers all concern the red heifer ceremony (Numbers 19) and use the phrase mei niddah, "waters of separation".[5] 2 Chronicles 29:5 includes a single exhortation of Hezekiah to the Levites, to carry the niddah, possibly idols of his father Ahaz, out of the temple in Jerusalem.[6] Usage in Ezekiel follows that of Leviticus. Finally, the Book of Zechariah concludes with an eschatological reference to washing Jerusalem:[7]

Zechariah 13:1 "In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem for sin and for uncleanness (niddah). (King James Version)

Rabbinic injunctions

The copious laws of niddah contained in the Jewish rabbinic writings are almost entirely made-up of "fences" (Hebrew: 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, or on her white garment or sheet, and which blood stain is larger in diameter than a fava bean (about 20 mm), in which case she must separate herself from her husband until she can be purified in a ritual bath (mikveh).[8] There are, yet, many other conditions that need to be met, by rabbinic ordinances, in order to render uncleanness to a blood stain.[8]

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.[9]

Ritual purity aspect

The Biblical regulations of Leviticus specify that a menstruating woman must "separate" for seven days (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 (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 (Leviticus 15:24).

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.[10] This encouragement was only for the Biblically prescribed seven-day period, not the five-day extension due to Rabbi Zeira's stringency. The Lubavitcher rabbi Menachem Mendel Schneerson discouraged abstaining from the midras of a niddah in modern times.[11]

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" (Leviticus 18:19).

The Torah concludes by imposing the punishment of kareth on both individuals (man and woman) if the prohibition is violated (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

  • Zavah, a woman having an abnormal bloody emission
  • Niddah, a woman emitting blood as a result of menstruation; more generally, a woman who has an impure status due to either niddah or zavah blood who has not yet purified herself by immersion in a mikveh
  • 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.[12] 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.[13]

Duration of niddah status

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. All Orthodox and some Conservative authorities rule that these "seven clean days" must be observed.[14][15]

Since according to the rules of zavah, the seven days must be counted from the point that the abnormal discharge ceases, it has historically been considered important in Judaism to determine when this occurs. Because the leaking of semen nullifies the counting of a "clean" day, the sages enacted that the counting of seven days not begin until a minimum of 72 hours since the beginning of menstruation has passed.

Orthodox Ashkenazi Jewish custom has lengthened this to effectively five days, which has been instituted in all cases regardless of whether the woman had engaged in sexual intercourse recently or not. Thus the niddah state lasts at least twelve days in the Ashkenazic tradition—the five days' minimum menstrual flow, plus the subsequent seven days. The count of days begins when the woman first sees her menstrual blood, and ends twelve days later, or seven days after the flow ceases, whichever is later.

Non-Ashkenazic Jews follow a variety of customs. Although the count could start in the middle of the day, it is always considered to end on the evening of the final day. Most Sephardic Jews use a slightly more lenient calculation resulting in a minimum of eleven days.

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 vaginal circumference. If the cloth shows only discharges that are white, yellow, or clear, then menstruation is considered to have ceased. If 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 absolutely 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 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

A niddah hut (Mergem Gogo) at the Jewish village of Ambober in northern Ethiopia, 1976.
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.[16][17] Such contact is forbidden whether or not the man and woman are husband and wife.[18]

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,[19] passing of objects even without touching, and sleeping in the same bed; these restrictions are to avoid the risk of leading to sexual contact.[20] These laws are termed harkhakot, meaning spacers, and result in a need for relationships to be able to develop in non-physical ways, such as emotional and spiritual connections.

Some Conservative poseks are considerably more lenient in reference to the harkhakot than Medieval or contemporary Orthodox authorities. In a responsum written in the Committee on Jewish Law and Standards of the Rabbinical Assembly, Rabbi Miriam Berkowitz ruled that the "harkhakot are to be observed as much as possible, but left up to the discretion of each couple".[21] In another responsum for the committee, Susan Grossman stated that touching that would be appropriate between siblings is permissible.[22]

The classical regulations also forbid sexual relations on the day that a woman expects to start menstruating;[23] there are three days that fall under this regulation, known as the veset, namely the same day of the month as her previous menstruation began; the day exactly 30 days after the previous menstruation started; and the day that is the usual interval from the end of her previous menstruation.[24] 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.[25]

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 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,[26] a situation sometimes called "halachic infertility".[27] 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.[28]

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.[29] 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.[30]

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.[31]

Immersion in water

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.[32] 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.[33]

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. At the mikvah 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.


According to all Orthodox authorities, the first time a virgin has intercourse, she also becomes "niddah" as a result of her "dam betulim" (Hebrew: "hymenal blood flow"). This is observed even if no blood was discovered. However, a bride counts only four days before performing a "hefsek taharah" (Hebrew: lit. pause of purity), instead of the usual five.[34] Some Conservative authorities rule that a woman is not a niddah in such a case unless uterine bleeding is observed.[14]

Privacy of the niddah process

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.

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.

In December 2006, the Rabbinical Assembly's Committee on Jewish Law and Standards passed three responsa discussing the extent of Biblical requirements and continuing applicability of rabbinic prohibitions concerning niddah for Conservative Jews. Each responsum advocated different standards of observance;[35] three responsa were passed as majority opinions - one by Rabbi Susan Grossman[36] and one by Rabbi Avram Reisner,[37] the third responsum, by Rabbi Miriam Berkowitz.[38]

According to two majority opinions, by Rabbi Grossman and Rabbi Reisner, 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. Rabbi Grossman, a majority opinion, and Rabbi Berkowitz, another majority opinion, ruled that women may rely on their own discretion about when menstruation has ended, and need not routinely engage in bedikah as described above.[36][37][38]

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:[39]

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]

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.[2]

See also


  1. ^ Leviticus 15:19-30, 18:19, 20:18
  2. ^ a b "Female Purity (Niddah) | Jewish Women's Archive". Retrieved 2020-02-19.
  3. ^ "Why Some Jewish Women Go to the Mikveh Each Month". My Jewish Learning. Retrieved 2020-02-19.
  4. ^ a b Jacobs, Joseph and Judah David Eisenstein (1906). "Red Heifer", Jewish Encyclopedia.
  5. ^ Theological dictionary of the Old Testament, Volume 4 ed G. Johannes Botterweck, Helmer Ringgren p163
  6. ^ 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."
  7. ^ George L. Klein, Ray Clendenen Zechariah New American Commentary ISBN 978-0-8054-9494-5, 2008, Page 373 "Zechariah 13:1 does not state who "opened" the fountain, but the context suggests that the Lord himself performed ... The Hebrew word for "impurity" (niddah) conveys a different point from hatta't.480 The term niddah focuses more on the ..."
  8. ^ a b Teherani, David (2019). Sefer Ma'ayan Ṭaharah Hashalem (The Complete Book 'Wellspring of Purification') (in Hebrew) (2 ed.). Betar Ilit: Beit ha-hora'ah de-kahal kadosh sepharadim. p. 6 (chapter 2). OCLC 232673878.
  9. ^ Tshuvath HaRambam (as quoted in Igrot Kodesh vol. 3 p. 374)
  10. ^ Shalah, vol. 1 p. 452, Pitchei Harakanti (Menahem Recanati) Chap. 586, Teshuvat HaRif Chap. 297
  11. ^ With the exception for unique individuals - Igrot Kodesh vol. 3 p. 374
  12. ^ Cohen, Alfred S. (1984-01-01). Halacha and Contemporary Society. KTAV Publishing House, Inc. ISBN 9780881250428.
  13. ^ Rahamim Shaul Sultan. Rose of the Valley. Feldheim. p. 50. 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
  14. ^ a b
  15. ^ "A Developmental Perspective on the Laws of Niddah", David C. Kraemer, Exploring Judaism: The Collected Essays of David Kraemer, Univ Pr of America, 1999
  16. ^ There is a dispute as to whether this prohibition is Biblical or Rabbinic. See Negiah; see also Badei HaShulchan 195:14.
  17. ^ There are additional restrictions in the time of the Holy Temple because of the Biblical concept of Tumah.
  18. ^ Remah Yoreh Deah 183:1; see Shiurei Shevet HaLeivi 183:7
  19. ^ When the wife is a niddah, touch between spouses that is not Derech Chiba v'Taavah is only prohibited Rabbinically according to most authorities, although there are those who disagree. See Badei HaShulchan 195:14.
  20. ^ Yoreh Deah 195
  21. ^ p. 36
  22. ^
  23. ^ Yoreh Deah 184:2
  24. ^ Yoreh Deah 189:1-2
  25. ^ Yoreh Deah 184:10
  26. ^ Evyatar Marienberg, "Traditional Jewish Sexual Practices and Their Possible Impact on Jewish Fertility and Demography," Harvard Theological Review 106:3 (2013) 243-286
  27. ^ Ivry, Tsipy (2013). "Halachic infertility: rabbis, doctors, and the struggle over professional boundaries". Medical Anthropology. 32 (3): 208–226. doi:10.1080/01459740.2012.674992. PMID 23557006. S2CID 42649279.
  28. ^ "Haaretz Newspaper, "Be pure or be fruitful" December 15, 2006". Retrieved 17 March 2018.
  29. ^ Mishneh Torah Kedushah Laws of forbidden relations 4:6
  30. ^ Mishneh Torah Kedushah Laws of forbidden relations 4:15
  31. ^ Mishneh Torah, Hilchot Issurei Biah 4:14
  32. ^ Shulchan Aruch, Yoreh Deah, 200.
  33. ^ See: Family Purity—A Guide to Marital Fulfillment, by Rabbi Fishel Jacobs, chapter 10.
  34. ^ Yoreh Deah, 196:11, Taz 5.
  35. ^ Rabbi Miriam Berkowitz, Mikveh and the Sanctity of Family Relations, Committee on Jewish Law and Standards, Rabbinical Assembly, December 6, 2006]
  36. ^ a b Rabbi Susan Grossman, Mikveh and the Sanctity of Being Created Human, Committee on Jewish Law and Standards, Rabbinical Assembly, December 6, 2006]
  37. ^ a b Rabbi Avram Reisner, Observing Niddah in Our Day, Committee on Jewish Law and Standards, Rabbinical Assembly, December 6, 2006]
  38. ^ a b Rabbi Miriam Berkowitz, Reshaping the Laws of Family Purity for the Modern World, Committee on Jewish Law and Standards, Rabbinical Assembly, December 6, 2006]
  39. ^ Archive of United Synagogue Review, text on Sanctifying Waters: The Mikvah and Conservative Judaism, retrieved 12-30-2011

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