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

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Pill to shorten periods

26 February, 2004


I gave birth 11 months ago and two months ago I got my period for the first time. It took 2 weeks before I was able to do the hefsek and since the second time I got my period almost three weeks went by before I did a hefsek. The doctor then gave me Utrogestan pills to take to stop the bleeding which enabled me to do the hefsek and said I can take them between three weeks and a month (in other words delay the next period). My questions are:
1. May I take them up to a month (given for almost three weeks I was bleeding before I can start counting)?
2. When are the Onot prisha – just the ones I calculated when I first saw the spots?
Thank you for your help.


1.  You may continue to take the pills up to a month, based on your doctor's assessment. Once your periods shorten, you should discontinue use of the pill.

2.  The onot perishah are based on when you first started bleeding this cycle. The interval onah will be based on when you first started bleeding this cycle and last cycle. Should you continue to take the pills and establish a pattern of three months of bleeding at a consistent interval after cessation of the pill, then you will have an established veset based on the interval from the cessation rather than the interval from the first day of bleeding.

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