Nishmat's Women’s Health and HalachaIn memory of Chaya Mirel bat R' Avraham

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Delaying mikveh to try for boy

23 December, 2010


Hi, thanks for this incredible resource.

Many doctors believe that to conceive a boy, one needs to have relations after ovulation, and not in the few days prior to ovulation.

If a woman normally ovulates a couple days after mikvah, thereby having relations directly before she ovulates, is it halachikly permissible to postpone mikvah till ovulation, in order to conceive a boy with the help of G-d.

What is the halacha in this regard?

Thank you for your assistance.


Although we cannot attest to the efficacy of this theory, from a halachic standpoint there is nothing inherently wrong with timing intercourse to try for a particular gender. Therefore it would be permissible to abstain from intercourse on nights less likely to lead to conception of a boy (according to such studies). You can choose to immerse as scheduled in order to permit other forms of affection and abstain from intercourse, or delay immersion until you would engage in intercourse. 

We also recommend that you try to accurately track your ovulation with over the counter ovulation kits so as not to abstain needlessly.

This internet service does not preclude, override or replace the psak of any rabbinical authority. It is the responsibility of the questioner to inform us of any previous consultation or ruling. As even slight variation in circumstances may have Halachic consequences, views expressed concerning one case may not be applied to other, seemingly similar cases. All health and health-related information contained within Nishmat's Women's Health & Halacha Web site is intended to be general in nature and should not be used as a substitute for consulting with your health care professional. The advice is intended to offer a basis for individuals to discuss their medical condition with their health care provider but not individual advice. Although every effort is made to ensure that the material within Nishmat's Women's Health & Halacha Web site is accurate and timely, it is provided for the convenience of the Web site user but should not be considered official. Advice for actual medical practice should be obtained from a licensed health care professional.

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