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

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FAM & veset haguf

3 August, 2022


Hi, I am using the Fertility Awareness Method. It involves taking your temperature every morning to track ovulation. I find that at the end of a cycle, from the first morning that my temperature drops, that means I will definitely get my period within 2 days.

Sometimes, those 2 days do not coincide with onah days. For instance, Wed. morning was the first day that month that my temperature dropped. I was confident that means I will definitely get my period before Friday morning. But, neither Wednesday nor Thursday are onah days.

Should I nevertheless separate from my husband on Wed. and Thursday, even if I don’t see spotting (I am still wearing black underwear and not looking at toilet paper) and have no other physical symptoms? Should I do a bedika?

Thank you very much.


If you consistently (i.e., for the past three cycles) find that you begin bleeding within two days of your temperature drop, then you should treat it as a veset haguf, a veset based on physical symptoms. You would refrain from relations during those two days and perform a bedikah at some point during this extended onah. You would not observe the yom hachodesh, haflagah, or onah beinonit.

If it is not consistent, (i.e., sometimes you do bleed within two days, sometimes you don’t), then this symptom is of no halachic significance. Nevertheless, you should use common sense and abstain, or at the very least check for bleeding (by wiping externally with a tissue not immediately after urinating) before intimacy.

Please feel free to get back to us with any further questions.

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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