MEDICAL PHYSIOLOGY

Detailed explanation-1: -Every month, a woman’s ovaries produce hormones that tell the cells lining the uterus to swell and get thicker. Your uterus sheds these cells along with blood and tissue through your vagina when you have your period. Endometriosis occurs when these cells grow outside the uterus in other parts of your body.

Detailed explanation-2: -During a typical menstrual cycle, the inside walls of the uterus grow a soft tissue lining called the endometrium. If you do not get pregnant, the endometrium is shed during menstruation.