Must a woman whose menstrual period exceeds ten days await the sight of the white discharge to perform ghusl, pray, and fast, or should she perform ghusl, pray, and fast after ten days according to the Hanafi school of thought? And is the fast of the day on which signs of menstruation appeared after Asr, then menstruation began the following morning, counted?

Scholars have differed regarding the maximum duration of menstruation. Abu Hanifa and Al-Thawri held that it is ten days, citing a weak hadith as evidence. The majority of scholars, however, held it to be fifteen days, and this is the correct view. A woman must wait until her menstruation ceases, as long as it ceases in less than fifteen days. As for the signs of menstruation, pain or yellowish and brownish discharges that precede menstruation are not considered menses, and fasting and prayer on that day are valid. However, if the sign was a few drops of menstrual blood, which then stopped, and heavy bleeding occurred the next day, then the fast is invalidated and its قضية (recompense/making up) becomes obligatory. If the slight bleeding ceases and she observes dryness until the next day, she must perform ghusl and pray. If she does not do so, she should make up the prayers as a precautionary measure.