Should a woman perform ghusl after the cessation of blood, or should she wait to see the white discharge if the yellowish discharge persists?

Purity from menstruation is achieved by one of two signs: dryness or the white discharge. Whenever a woman observes either of these, she must perform ghusl (ritual bath) and pray, and she assumes the ruling of ritually pure women. Yellowish or brownish discharges are considered menstruation if they occur during the habitual period, and not menstruation outside of these days.