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

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Veset kavua on pill

22 January, 2012


I am on birth control and know that on Thursday morning I will start my next period. It has been more then three times in a row that it starts on the 4th morning after ending my pack of pills.

Am I allowed to have relations with my husband on Wednesday night?

Also, since I know exactly when I will get my period in relationship to when I stop the pill, should I be doing any bedikot throughout the month?

Thank you.


If, for your last three consecutive cycles, you began your flow on the fourth morning after stopping active pills, then you have a veset kavua for the fourth day.  That means that relations are permitted the night before.  Additionally, you are required to observe a veset on day four, which includes performing at least one bedikah and abstaining from relations.  You are released from observing other veset days.  If your pattern changes, then you will have additional vesatot to observe.

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