Question

During menstruation which part of the uterus remain intact or not shed with the flow?

• A. Basal layer of uterus
• B. Cervical epithelial layer
• C. Endometrium of uterus
• D. Both A & C

Answer 1

The correct option is A

Basal layer of uterus

During menstruation only the functional layer of the endometrium is shed, with the basal layer remaining intact. Progesterone prepares the endometrium to receive and nourish a fertilized egg. If pregnancy does not occur, estrogen and progesterone levels decrease. The decrease in progesterone triggers menstruation, or shedding of the lining.