Uprooting long intervals
10 January, 2005
Thanks for your site. I looked through many of the posted articles/questions, but could not find the answer to this. Perhaps you can advise me.
I had a 55 day cycle, followed by a 32 day cycle. By the time the veset haflaga rolls around from the first period, I will have already finished the second, counted the seven days, and gone to the mikva.
Do I still need to observe that veset?
You do not need to observe the haflagah (interval) calculated from the first period. You calculate your interval only from the date of onset of your most recent period. Therefore, next month you will observe an interval of 32 days from the onset of your last period.
The question of whether a long interval can be uprooted by a shorter one is subject to halachic debate. Our position is as follows:
A veset she'eino kavua for interval is uprooted after one cycle only if you reach that date without becoming niddah. But if a long interval is followed by a shorter interval, as in your case, the long interval is not uprooted. Thus, you cannot actually uproot your 55-day interval until you reach day 55 without menstruating.
In practice, this means that any time you get your period before day 55, your interval clock restarts and there are no practical implications. However, if you ever reach day 55 without having menstruated first, you should observe it as an interval day.
In theory, the 55-day interval is never uprooted until you experience a longer interval. In practice, the custom is to note it at the top of your veset calendar and keep track of it for a year.
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 yoatzot.org.