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

  • Hebrew
  • English
  • Espnaol
  • Francais

Chorionic Villi Sampling (CVS)

19 June, 2017


Does a cvs (chorionic villus sampling) procedure that causes spotting render someone a niddah?


In CVS, a small needle is inserted either via the abdomen or via the cervix to get tissue for examination. In the latter case, a tenaculum is used to grab the cervix, which often causes cervical bleeding. This type of bleeding is considered dam makkah and does not render one niddah. However, there generally is uterine bleeding as well which is caused by physical trauma to the uterus.  There is a halachic debate whether uterine bleeding due to trauma would render a woman niddah. The rabbi of this website, Rav Yehuda Henkin, rules that bleeding caused by such trauma does not make a woman niddah. Therefore, any spotting within a few days of CVS may be disregarded and does not render a woman niddah.

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

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

Accessibility Toolbar