Question

The following diagram represents the vertical sectional view of the human female reproductive system.
(c) What happens to the uterus, if fertilisation fails to take place?

Answer 1

If fertilisation does not occur, the ovum disintegrates and corpus luteum stops the production of progesterone. This leads to shedding of the thickened uterine lining and it flows out with blood loss through the cervix and vagina.