Menstruation? If your husband doesn't believe you, he can have sex with you

e13.1 The minimal age for menstruation is about 9 full years. There is no maximal age for the end of it, as it is possible until death.

The minimal menstrual period is a day and a night. It generally lasts 6 or 7 days. The maximal period is 15 days.

The minimal interval of purity between two periods is 15 days. There is no maximal limit to the number of days between periods.

e13.2 Whenever a woman who is old enough notices her bleeding, even if pregnant, she must avoid what a woman in her period avoids (defL e13.4). If it ceases in less than 24 hours (lit. "the minimum"), then it is not considered menstruation and the woman must take up the prayers she has omitted during it. If it ceases at 24 hours, within 15 days, or between the two, then it is menstruation. If it exceeds 15 days, then she is a woman with chronic vaginal discharge (dis:e13.6).

Yellow or dusky colored discharge is considered menstrual flow.

If a woman has times of intermittent bleeding and cessation during an interval of 15 days or less, and the times of bleeding collectively amount to at least 24 hours, then the entire interval, bleeding and not bleeding, is considered menstruation.

e13.3 Postnatal bleeding (nifas) lasts at least a moment, generally 40 days, and at most 60. If it exceeds this, the woman is considered to have chronic vaginal discharge (dis:e13.6)

e13.4 All things unlawful for someone in a state of major ritual impurity (janaba) (dis:e10.7) are unlawful for a woman during her menstruation and postnatal bleeding. It is also unlawful for her to fast then, and the (N: obligatory) fast-days she misses must be made up later, though not missed prayers.

It is unlawful for her:

(1) to pass through a mosque when she thinks some of her blood might contaminate it (N: and it is unlawful for her to remain in the mosque under any circumstances (n: when menstruating or during postnatal bleeding)):

(2) to make love, or take sexual enjoyment from what is between her navel and knees;

(3) to be divorced;

(4) or to perform purification with the intention to raise a state of ritual impurity.

When her bleeding ceases, then fasting, divorce, purification, and passing through the mosque are no longer unlawful for her, though the other things remain unlawful for her until she performs the purificatory bath (ghusl, def:e11).

e13.5 If a woman claims to be having her period, but her husband does not believe her, it is lawful for him to have sexual intercourse with her.

e13.6 A woman with chronic vaginal discharge (N: preparing to pray) should wash her private parts, apply something absorbent to them and a dressing, and then perform ablution (N: with the intention discussed above at e5.3). She may not delay (N: commencing her prayer) after this except for reasons of preparing to pray such as clothing her nakedness, awaiting the call to prayer (adhan), or for a group to gather for the prayer. If she delays for other reasons, she must repeat the purification. 

She is obliged to wash her private parts, apply a dressing, and perform ablution before each obligatory prayer (N: though she is entitled, like those mentioned below, to perform as many nonobligatory prayers as she wishes, carry and read the Koran, etc. until the next prayer's time comes (n: or until her ablution is broken for a different reason), when she must renew the above measures and her ablution).

e13.7 People unable to hold back intermittent drops of urine coming from them must take the same measures (def: above) that a woman with chronic vaginal discharge does. (N: And likewise for anyone in a state of chronic annulment of ablution, such as continually breaking wind, excrement, or madhy (def:e10.5) though washing and applying an absorbent dressing are only obligatory when filth exits.)

(A: If a person knows that drops of urine will not stop until the time for the next prayer comes, then he takes the above measures and performs the prayer at the first of its time.)