Onot after miscarriage
After a miscarriage, when do I begin calculating my Onot again since there is no previous cycle history now?
Thank you for your question.
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.
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