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

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Veset kavua within two years postpartum

10 January, 2016


I have a question about whether I have a veset kavuah. I do not have a rav to call about this, but i was using my online mikvah calendar and I got this message: "A Fixed cycle (veses kavuah) has been established by three flows all having haflagah number 56."

I am not sure what to do next. Also, I gave birth to a baby 23 months ago. Her second birthday on the Hebrew calendar falls out a month from tomorrow.  So that might be a factor.

Can you advise me on how to proceed with my counting of onot? Thank you.


A woman within 24 months of giving birth does not establish a veset kavua. Therefore, even though you experienced an interval of 56 days (or 56 onot, if the online calendar is set to follow Chabad custom) three times in a row, this veset remains a veset she'aino kavua. As such, you should observe your vesatot as usual (yom hachodesh, haflagah, and onah beinonit).

Should you continue to experience this interval three times in a row once your baby turns two, you can get back to us for further guidance.

We are glad you checked with us. Online veset calculators can be very helpful, but it is important to learn the relevant halachot before using them so that you will be alert to questions like this one.


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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