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

  • Hebrew
  • English
  • Espnaol
  • Francais

Onot after miscarriage

5 February, 2003


After a miscarriage, when do I begin calculating my Onot again since there is no previous cycle history now?


We are sorry to hear of your miscarriage.

Assuming that you did not have an established veset (veset kavua) before your pregnancy, and that you miscarried more than forty days after your last pre-pregnancy mikveh immersion, then you are halachically considered to have no previous cycle history. You have no onot perishah to observe until you start menstruating again. An entirely new pattern will be established after the miscarriage.

First, you need to stop bleeding, complete the taharah process and use the mikveh. Just as after childbirth, this may take a few weeks and the bleeding may be somewhat "on and off." (If your miscarriage occurred more than forty days after your last mikveh immersion before pregnancy, then you have to wait a minimum of two weeks after the miscarriage before going to mikveh. However, it is rare for a woman in this situation to bleed for less than a week, so you will probably wait at least this long anyway.)

From your first period after mikveh immersion, you calculate the date of the month (chodesh) and thirty days (beinonit) for the next month. You will not yet have an interval. After your second period, you calculate the chodesh, the thirty days, and the interval that you just experienced. It is not unusual for the cycles to be a bit irregular for a few months as the body resets itself to regular cycling.

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

Have you always dreamed of becoming a Kallah Teacher?
We are happy to announce two Kallah Teacher Certification Courses in English.
Join us for enriching and professional courses.
or in