Doubting whether haidh has ended
Q: Toward the end of a menstrual period, often it is not clear if the period has ended or not. This causes a frustrating problem: should she wait until she is sure the period has ended, even though she is risking missing a prayer, or should she make ghusl and pray even though it is possible the period has not yet ended? You see, if she chooses to be cautious, often she has to make multiple ghusls until she is finally sure.