Question: My wife performed after-menstruation Ghusl (full ritual bath) on the first day of Ramadan, but she observed fast before doing this Ghusl. Is her fast on that day valid? Sometimes, after she performs after-menstruation Ghusl, some drops of blood are still seen. In this case, should she repeat the after-menstruation Ghusl?
Answer: A woman should perform after-menstruation Ghusl when her menstrual blood has completely stopped; that is, she sees the sign of Tuhr (purity from menstruation or postpartum blood, i.e. seeing the white discharge or seeing no blood traces). As long as some menstrual blood is still seen, even if it is little, a woman is still considered menstruating, except when the menstrual period exceeds the maximum time, i.e. Fifteen days… read more here.