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.
Pituitary gland is the endocrine gland that communicates with hypothalamus in our body growth.
Pluto is not considered a planet due to all the reasons you stated above
<span>Skeletal muscle tissue</span>