Part A:In menstruation, the functional layer is shed from the endometrium. Explain the hormonal and physical factors responsible for this shedding.Part

Part A:
In menstruation, the functional layer is shed from the endometrium. Explain the hormonal and physical factors responsible for this shedding.

Part B:
Fertilization involves much more than a mere restoration of the diploid chromosome number.

1. What does the process of fertilization entail on the part of both the egg and sperm?
2. What are the effects of fertilization?