<prompt> Halbans disease is due to :Persistent corpus luteumDeficient corpus luteumPersistent trophoblastDeficient trophoblast  <response>: Irregular Endometrial Shedding Halbans Disease It is rare and self-limited Irregular shedding is due to persistent corpus luteum The menstruation comes on time, is prolonged but not heavy Progestogen can suppress the bleeding, but needs to be taken on tapering dose for 20 days to complete the cycle Reference: Shaws textbook of Gynaecology; 16th edition; Page 307 