Can a woman pray and perform other obligatory acts of worship while experiencing heavy menstrual bleeding that takes two or three months to treat?

If the bleeding exceeds the usual duration of menstruation, the woman must perform ghusl (ritual purification bath), place a barrier (like a pad), then pray and fast normally. This is because the excess blood is considered istihada (prolonged non-menstrual bleeding), not menses. For this blood, wudu (ablution) is required for every prayer.