[Religious (Halachic) infertility].

Reproductive concepts and practices among observant Orthodox Jews may Lead to Halachic subfertility in a significant portion of couples. According to Halachah [the Jewish code of law) sexual activity may not take place during the time a woman menstruates (Niddah) as well as for a full week thereafter (7 days of cleanliness). Coitus is allowed to resume after the woman has immersed herself in a ritual bath (mikvah). In the case of unexpected spotting or bleeding (Zavah), the woman should consult a rabbi and a doctor to determine the origin of the blood. Uterine bleeding entails that intercourse is forbidden for a minimum of 5 initial days plus 7 days thereafter. In practice, any minute bleeding or spotting, regardless of timing during the menstrual cycle, renders the woman ritually impure and invokes the stringencies of Niddah rulings. Even a physiologic occurrence such as midcycle ovulatory bleeding or spotting renders the woman Zavah and prohibits sexual intercourse at the optimal time for conception. The inability to conceive in this halachically mandated time period is not due to a biologic fault but rather to social, cultural and religious norms as defined by the rabbinate. Medically lengthening the pre-ovulatory phase is a common practice, as shortening the count of days of ritual impurity is often seen as nonnegotiable. Ethical issues concerning the role of the physician and the safety of such treatments are discussed.