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

  • Hebrew
  • English
  • Espnaol
  • Francais

When did bleeding begin?

19 December, 2004


My periods have been, for the last 3 months, every 30 days and when thirty days passed without bleeding last Monday (Rosh Chodesh) and the rest of the week, I thought this might be the signal that I was pregnant. I went to sleep yesterday (Shabbos – day 35) afternoon at around 4 and woke up at around 5:40. Shabbos was over at 5:30. When I went to the washroom, I saw blood and realized this was my period. My question is– Which day counts as day 1? Shabbos or Sunday? I didn't go to the washroom before I went to sleep so I don't know if my period started then.


When there is uncertainty about when bleeding began, halachot are determined based on the time the bleeding was discovered. You discovered the bleeding after sunset. Therefore, Sunday is day one for the purposes of the five day count and you have a night onah for purposes of veset calculations.

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.

For further questions or comments: 

The Nishmat Women's Health and Halacha Site is a public service of Nishmat, The Jeanie Schottenstein Center for Advanced Torah Study for Women. This project and others like it are made possible by contributions from people like you. If you have benefited from the service, and wish to enable us to help others, click here to donate.

Users of Internet filtering services: This site discusses sensitive subjects that some services filter without visual indication. A page that appears 100% complete might actually be missing critical Jewish-law or medical information. To ensure that you view the pages accurately, ask the filtering service to whitelist all pages under