If an ovum is not fertilized production decreases and the is shed

If an ovum is not fertilized ESTROGEN production decreases and the LINING OF THE WOMB is shed. As a woman of child bearing age is approaching ovulation, the body increases the production of estrogen hormone, which causes the lining of the uterus to thicken and which also provide a sperm-friendly environment. If fertilization do not take place the body reduces the production of estrogen and the thickened uterus lining will be shed.