Niddah, Immersion, and Evaluating Bleeding

Niddah is a defined state of ritual impurity associated with qualifying uterine bleeding. Arayos are relationships prohibited by the Torah in the severe category discussed in the preceding chapters. The niddah prohibition applies even to a man’s own wife.

Kareis is a punishment imposed by Heaven; the liability stated here concerns an intentional transgression. The initial stage of penetration already establishes this liability; completion is not required. The usual and unusual manners refer respectively to vaginal and anal intercourse.

This age is the threshold relevant to the other participant’s liability under these laws, as explained in chapter 1, halachah 13. It does not mean that the child is subject to punishment, or that conduct below this threshold is permitted.

The age at which ritual impurity can begin is different from the age relevant to liability for intercourse. If the qualifying bleeding occurs, even a newborn can become a niddah.

Zivah is a separate category of uterine bleeding during the days designated for it. The ten-day threshold refers to the full zavah status resulting from three consecutive days of bleeding: the earliest possible sequence is the eighth, ninth, and tenth days of life, after the initial seven-day niddah period.

The prohibition follows the woman’s halachic status, not merely whether blood is presently flowing. Under the Torah’s basic niddah framework, bleeding on the first day establishes a seven-day period even if it stops immediately afterward. Childbirth establishes a period of seven days for a boy or fourteen for a girl.

Zivah has two categories. A zavah gedolah must count seven clean days after her bleeding ends. These are seven consecutive days without qualifying uterine bleeding, counted according to the prescribed examination rules. A zavah ketanah has a shorter required period of observation, as explained in chapter 6. The prohibition applies during the relevant bleeding and counting periods, subject to the specific immersion rules explained there. The essential point here is that the cessation of bleeding alone does not permit relations.

“Maidservant” here refers to a Canaanite maidservant subject to these ritual laws. Her status differs from that of the non-Jewish women discussed in halachah 4. These are the underlying Torah categories. Under present practice, the distinction between niddah and zivah is not used to dispense with the requirement of seven clean days before immersion, as explained in chapter 11.

These verses connect zivah and childbirth impurity to niddah. The connection establishes that the prohibition of relations carrying kareis applies to these states as well. The two childbirth verses refer respectively to the birth of a boy and the birth of a girl.

A mikveh is a body of water meeting the Torah’s requirements for ritual immersion. An ordinary bath does not substitute for it. The preceding halachah’s time periods do not eliminate the requirement to immerse.

Immersion must take place at the time prescribed for the particular category of impurity. For a niddah, immersion during her seven-day period does not remove her status. Under the underlying Torah framework, a zavah gedolah may immerse during her seventh clean day, although relations remain prohibited until evening, as explained in chapter 6, halachos 11–14. This is distinct from the accepted present practice described in chapter 11.

The end of bleeding and the passage of time do not automatically remove this status. Until the required immersion takes place, the prohibition remains, however long it has been since the bleeding or birth.

A binyan av is a rule derived from a case that serves as a model for others. Here, the requirement of washing in water establishes that the passage of the relevant time does not replace immersion. It does not mean that immersion dispenses with any other purification requirements.

The same physical bleeding does not, by itself, create these Torah-defined statuses in a non-Jewish woman. Consequently, relations with her do not incur liability under these particular prohibitions. Such relations remain prohibited on other grounds; this halachah does not permit them.

Zavim is the plural term used here for the discharge-related impurity category. The decree assigns a ritual status regardless of whether a qualifying discharge actually occurred. It was instituted as a safeguard against intimate association, as discussed in Hilchos Metamei Mishkav Umoshav 2:10. This Rabbinic decree does not create the Torah-level liability for niddah described above.

These days follow the initial childbirth-impurity period; they do not begin at birth. After a boy, the seven initial days are followed by thirty-three days, making forty altogether. After a girl, fourteen initial days are followed by sixty-six days, making eighty altogether.

This is the Torah’s underlying law, not the accepted practice today. As explained in chapter 11, halachos 5–6, the practice is not to permit uterine bleeding on the basis of dam tohar. Bleeding during these days also requires the applicable purification process, including seven clean days before immersion.

Within this basic Torah framework, the blood’s legal classification changes at the prescribed boundary even though the physical source of the bleeding is the same. The Torah distinguishes the initial seven or fourteen days from the subsequent thirty-three or sixty-six days; the permission still requires immersion.

There is also an essential qualification within the Torah’s law itself. As the Kessef Mishneh explains, citing chapter 7, halachah 7, a woman who entered childbirth with an outstanding zavah requirement must complete seven clean days before immersion. The childbirth timetable alone does not remove that separate requirement.

Qualifying clean days can count toward her zavah requirement even within the initial childbirth-impurity period. She does not automatically have to add seven more days after the seven or fourteen days of childbirth impurity. Both requirements must be satisfied; their relationship is explained in chapter 7, halachos 5–7.

The general time for the immersions discussed here is daytime. A niddah and a woman after childbirth are exceptions: their prescribed periods must end completely before immersion can remove their status.

Immersion cannot shorten the seventh day. The entire seven-day period must finish, so her immersion takes place on the following night.

Here, the Rambam is discussing the Torah’s basic seven-day niddah period. This is different from seven clean days counted after bleeding stops. Under present practice, seven clean days are required, and the regular immersion time is the night following their completion, as explained in chapter 11.

As established in halachah 2, the Torah connects childbirth impurity to niddah. The full seven days following the birth of a boy, or fourteen following the birth of a girl, must therefore end before immersion.

These are the earliest nights permitted by the childbirth timetable itself. Any outstanding requirement to count seven clean days must also be fulfilled; the childbirth timetable does not replace it.

This concerns a niddah or a woman after childbirth whose required period has already ended. Although she has waited beyond the earliest possible immersion date, the ordinary rule still requires nighttime immersion.

Someone observing a daytime immersion may not know that the woman has already waited beyond her required period. She might mistakenly conclude that immersion is permitted during the seventh day itself.

The nighttime requirement after a delay is a safeguard against that misunderstanding. The exception for difficult circumstances follows in the next halachah.

Illness that makes nighttime immersion difficult, or the nighttime travel obstacles described here, allows an exception to the ordinary nighttime requirement. These circumstances do not allow immersion before the required period has ended.

For a niddah in the Torah’s basic framework, the eighth day comes after all seven days have passed. This allowance does not permit immersion during the seventh day, even if the couple intends to wait until night before resuming relations. The Shulchan Aruch makes this distinction explicit (Yoreh De’ah 197:4).

The eighth day is not a universal immersion date. A woman after childbirth must complete the applicable childbirth period, and under present practice the required seven clean days must also be completed. The concession changes the permitted time of day; it does not shorten the required count.

A veset is an established pattern indicating when menstruation is expected to begin. Outside the time associated with that pattern, the husband may rely on her established pure status unless there is a recognized reason to regard it as changed.

Becoming established as a niddah among her neighbors means that her conduct identifies her as such—for example, wearing clothing specifically designated for her niddah period. An unsupported rumor does not establish this status.

The words “who have a veset” qualify the ruling. The Maggid Mishneh and Kessef Mishneh explain that when she has no fixed veset, the husband must ask about her status rather than rely on this particular presumption.

His absence does not itself overturn the presumption of purity. The permission remains subject to the stated conditions: she has a fixed veset, he left her pure, and it is not the period when her menstruation is expected. An onah here is the relevant daytime or nighttime period, as explained in halachos 12–13.

If enough time has elapsed for menstruation and the necessary purification, he may presume that she completed that purification, including immersion, if she became impure during his absence. The passage of time itself does not make her pure.

The reference to finding her asleep concerns whether he must ask about her ritual status. It does not permit relations with a woman who is fully asleep. The separate requirement that marital relations take place willingly remains in force (chapter 21, halachah 12; Siftei Cohen, Yoreh De’ah 184:31).

When her last known status was niddah, he cannot assume that purification has taken place merely because enough time has passed. He must hear from her that she has become pure.

This differs from the earlier case: there, he left her pure and could rely on that established status under the stated conditions.

This is a retraction of her original statement, rather than a report that she subsequently completed purification. Her first statement established that she was prohibited, and simply calling it a joke does not undo its legal effect.

An amatlah is a credible explanation accounting for why she made the earlier statement even though it was not true. Such an explanation can resolve the contradiction, as the following example demonstrates.

The Rema’s ruling also distinguishes a correction made within toch kedei dibbur—the brief halachically recognized interval for retracting a statement. A correction within this interval is accepted (Yoreh De’ah 185:3). A later retraction requires the credible explanation described above.

Her explanation gives a specific reason for her original words: she wanted to avoid an intimate encounter while his relatives were nearby. She accounts for the statement rather than simply withdrawing it.

Other credible explanations can serve the same function. The Hagahos Maimoniyos gives examples such as an initial mistake about her halachic status or a statement made because she lacked the strength for relations.

Relations began while she was permitted to him, but she now reports that she has become a niddah. Although he must stop, withdrawing while erect would itself constitute a further forbidden act. He must therefore follow the procedure described below.

The same procedure applies if, during relations, he discovers that the woman is forbidden to him under another ervah prohibition. Even when the initial entry was inadvertent, withdrawing while erect can constitute a separate forbidden act.

As elsewhere, liability to kareis concerns deliberate transgression. Inadvertent wrongdoing has its own rules of atonement.

He must stop movement and wait until he can withdraw without an erection. The Rema adds that awareness of the gravity of the situation should fill him with awe (Yoreh De’ah 185:4).

A veset identifies when menstruation is expected. The restriction anticipates possible bleeding during relations; it does not mean that she has already become a niddah.

The Maggid Mishneh explains that this precaution is Rabbinic. The verse serves as an asmachta—Scriptural support for the enactment.

The relevant unit is an onah: the daytime or nighttime period containing the expected onset. The restriction begins at the start of that period, even if bleeding usually begins several hours later.

The next halachah explains when the restriction ends. Chapter 8 develops the detailed rules for determining which periods must be observed.

The expected hour passing is not enough. The entire daytime or nighttime period containing that hour must finish. The following examples clarify this distinction.

Although her usual hour has passed without bleeding, the daytime onah is still in progress. They must therefore continue refraining until it ends.

The nighttime case follows the same principle: the restriction continues through the entire night, rather than ending when the usual hour passes.

A further qualification concerns checking that bleeding has not begun. The Tur and Rema require an examination in connection with the expected veset. For an established veset, the Rema records the practice that she remains prohibited until she checks, even after the onah has ended (Yoreh De’ah 184:9).

This describes the Rambam’s position concerning routine checks. The Shulchan Aruch records a different ruling for a woman with a fixed veset: she does not require routine checks before or after relations. The Rema identifies that ruling as the accepted practice (Yoreh De’ah 186:1).

That exemption concerns routine checks surrounding relations. It does not remove examinations required for purification or those associated with an expected veset.

These are cloths prepared for checking, rather than ordinary washing. Examining both cloths can reveal blood that was present during relations. The next halachah describes the cloths themselves.

Her reliability concerning her own examination also permits him to rely on her examination of his cloth. He does not have to inspect it personally.

Worn fabric is soft and pliable, making it suitable for checking. White fabric makes blood easier to notice. The cloth must also be clean, so that a preexisting stain does not create confusion.

The Kessef Mishneh and Shulchan Aruch explain that cotton may also be used (Yoreh De’ah 196:6).

Ed means “witness,” and edim is its plural. These cloths provide evidence of whether blood was present. In the following halachos, “his ed” and “her ed” therefore refer to checking cloths, rather than human witnesses.

The Rambam distinguishes an additional practice from a required examination. For a woman without a fixed veset, checking beforehand is obligatory according to his ruling.

Her two edim serve different purposes: one checks her status before relations, and the other checks for bleeding afterward. Her husband’s cloth after relations is additional to these.

Outside the time of her expected veset, the Rambam does not require this woman to check before relations. The examination described at the beginning of the halachah is an additional practice in her case.

As explained in halachah 14, later authorities differ from the Rambam concerning routine examinations. His description here should be understood as his particular ruling.

These women are generally less likely to experience menstrual bleeding. Nevertheless, according to the Rambam, that reduced likelihood does not remove the requirement to check afterward.

Here, “two edim” means the two cloths used after relations—one by each spouse.

The first exception concerns bleeding associated with the initial acts of marital relations. The second concerns dam tohar, blood during the Torah-defined days of purity after childbirth, discussed in halachah 5.

These cases involve blood that does not itself prohibit relations under the Torah framework discussed here. With dam tohar, the distinction is the blood’s legal classification, rather than a different physical source.

These exceptions belong to the legal framework being explained here. They do not mean that hymenal bleeding or postpartum bleeding is permitted under present practice; the additional restrictions are discussed later.

The Rambam distinguishes using the cloths from visually inspecting them. Each spouse uses the appropriate cloth after every act, but they may wait until morning to examine the cloths for blood.

This continues his ruling concerning checks after relations; it does not remove any separate examination required beforehand.

Blood on either spouse’s cloth can reveal that she bled. The following halachos address circumstances in which blood might instead be attributed to another source.

When the original cloth remains available, it can still be inspected. Once it is lost, the possible evidence cannot be recovered, so she must perform a fresh examination before further relations.

If that examination is clean, she may proceed under this ruling; the loss of the earlier cloth does not itself establish that she became impure.

The Maggid Mishneh explains that the ed was known to be clean before use. The question is therefore whether the blood came from her examination or reached the cloth afterward.

An elongated stain is consistent with blood being spread across the cloth during wiping. It is attributed to the examination and renders her impure even when small.

A round stain can be attributed to a louse crushed where the cloth was placed. The insect’s remains need not be found for this attribution to apply.

The Shulchan Aruch qualifies this allowance: attribution to a louse applies when the round stain does not exceed a gris, a traditional measure of surface area. A larger stain cannot be explained by the blood of a louse alone (Yoreh De’ah 190:34).

This size allowance applies to the round stain that can be attributed to a louse. It is not a general minimum size below which every blood finding on a checking cloth is disregarded.

Location also matters. The Maggid Mishneh explains that when the cloth was stored in a protected place where this explanation is not plausible, such as a box, a round shape alone does not establish purity.

After touching the cloth to her thigh, she put it in a safe place. Since it was initially clean, the blood is attributed to her examination. We do not introduce the possibility that contact with her thigh happened to crush a louse.

This differs from placing the cloth beneath a pillow, where the previous halachah recognizes that explanation. The Maggid Mishneh understands the Rambam’s ruling here to apply even when the stain is round.

An unchecked cloth introduces a different uncertainty: the stain may already have been present before she used it. A stain no larger than a gris can be attributed to a louse. Once it exceeds that amount, this explanation is insufficient.

“Less than that amount” means less than the disqualifying amount of a gris plus something additional. A stain exactly the size of a gris is therefore included in the allowance.

An unchecked cloth means one whose previous condition is unknown. It is distinct from a cloth known to have already been stained, which the Rema discusses separately (Yoreh De’ah 190:36).

One or two occurrences do not yet establish the recurring pattern described here. After each occurrence, she must complete the necessary purification before relations may resume. The permission for a third occasion likewise applies only after purification.

These rules concern bleeding during relations or discovered immediately afterward within the relevant halachic interval. A later discovery does not by itself establish this particular pattern of bleeding caused by relations.

The three occurrences must be consecutive, without an intervening occasion of relations without such bleeding. Three qualifying occurrences establish a chazakah: a legal presumption that the pattern will continue.

Once that pattern is established, the couple may not simply continue after another purification. Halachos 21–22 discuss the resulting divorce requirements, subsequent marriages, and examination of the bleeding’s source. The conditions under which examination can permit continued marriage require separate explanation there.

This rule concerns the relevant uterine bleeding, rather than hymenal bleeding associated with the beginning of marriage, which is discussed separately in chapter 5.

The question is whether relations themselves have been established as causing the bleeding. When the bleeding can instead be explained by her expected menstruation, it does not establish that particular pattern.

This attribution does not make menstrual blood pure, nor does it permit relations during the prohibited onah discussed in halachos 12–13.

A bleeding wound provides another explanation for the blood. However, a known difference in color between the wound’s blood and the blood found during relations prevents that attribution.

The Maggid Mishneh and Siftei Cohen explain that she need not establish through comparison that the colors match. Unless a difference is known, the wound may remain the explanation under this ruling.

In the case described by the Rambam, her statement identifies a wound from which blood actually emerges. Merely mentioning a wound does not convey the same information. The Shulchan Aruch records her reliability in reporting this bleeding wound (Yoreh De’ah 187:6).

The distinction is the source of the blood. Blood attributable to a wound is treated differently from menstrual bleeding, even when the wound is within the uterus.

This continues the preceding halachah: three consecutive qualifying occurrences establish a recurring pattern with this husband. The requirements concerning the timing and source of the bleeding still apply, and purification is required before each otherwise permitted subsequent occasion.

The pattern established with her first husband does not yet establish that the same difficulty will occur with every husband. She may therefore marry another man.

Even after the pattern recurs with a second husband, the possibility remains that the difficulty is particular to those marital relationships. She is therefore permitted to marry a third husband.

The three consecutive qualifying occurrences are counted separately with each husband, rather than as one combined total across the marriages.

Once the pattern has been established with three different husbands, it is no longer treated as a difficulty particular to one couple. A broader chazakah—a legal presumption—is established that the bleeding will recur with another husband as well.

Another purification or the passage of time alone does not resolve that concern. The next halachah explains an examination used to determine whether the bleeding comes from a source that permits marriage.