What should a woman do if she experiences a yellowish discharge after purity (dryness) after 6 days, and she does not know if her period before this month was more than 6 days? Is the yellowish discharge considered menses, given the uncertainty about the number of menstrual days last month, or is it not? Can the rule of "certainty is not removed by doubt" be applied, and the woman consider herself pure after the dryness, despite the doubt about the return of menses with the yellowish discharge and not knowing if it falls within the duration of her customary period? Is it sufficient to know the approximate start and end times of menstruation to determine the duration of the customary period?
Source: FtawySummarized from the full answer at Ftawy · imported Sep 2, 2026
A woman who is uncertain about the number of days of her menstrual period should base it on the minimum, because the default is against an increase. So, if her usual period was six days and she is uncertain on the seventh day whether it is part of her period or not, the default is that it is not. Consequently, yellowish and brownish discharges seen after observing purity and the passing of the certain days of menstruation are not considered menses. An approximation is sufficient for knowing and regulating the usual period.
Summarized from the full answer at Ftawy · imported
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