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

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Uprooting veset kavua from before pregnancy

11 November, 2015


Hi: Thank you so much for this wonderful service. I'm so grateful to have a safe platform to ask my questions:

I have an unusual question. I am married almost 11 years and I have five children b''h. I had a miscarriage soon after getting married and then I had 3 months before getting pregnant with my first child where my period became kavua. I got my period 3 times on Shabbos at 11:30am. I know that sounds strange but it's true.

At the time my Rabbi said I have to wait till my baby is 24 months before I can uproot my cycle. B''h I've been pregnant before that time until now. My youngest turned two about three months ago. I'm not sure when to start counting the 24 months. Does it start on her birthday? Or if the year before was a leap year does that make a difference?

What do I have to do to uproot the veset kavua? I have had two periods so far since her birthday. Neither one began on Shabbat. I did regular bedikos on the days of my expected period and during shiva nekiim but nothing extra. I hope I didn't miss doing something I was supposed to do. What should I do now?
Thank you very much for your help.


You should count 24 months from when your youngest was born. If there was a leap year, then that comes out one month before her Hebrew birthday.

In order to uproot a veset kavua, one must perform a bedikah on the day of the veset for 3 months in a row. If the bedikot come out clean and menstruation does not begin on that day/onah, the veset kavua has been uprooted. Even if 3 months have passed and one did not begin menstruating on the veset date throughout the 3 months, if a bedikah was not performed on each veset day, the veset kavua has not been uprooted.

Therefore, if you had a veset kavua for every 4th Shabbat at 11:30, for the next 3 months you should perform a bedikah at 11:30 on the 4th Shabbat from your previous period. If your bedikah on the veset is acceptable for the next 3 months, your veset has been uprooted.

Nevertheless, unless a new veset kavua is established, the old veset kavua remains dormant. Meaning, if in the future you get your period on the 4th Shabbat from your previous period, you have reverted to your old veset kavua, and must perform bedikot on that veset for 3 months until it has been uprooted again.

The halachot of veset l'yom hashavua (veset on a specific day of the week) are complicated, since the veset itself is similar to a veset haflagah (interval). Should you revert to this particular veset, please be in touch with us for further guidance.

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


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