Meet Estrogen, a hormone that regulates the menstrual cycle, pregnancy and secondary sex characteris

MeetEstrogen, a hormone that regulates the menstrual cycle, pregnancy and secondary sex characteristics such as breasts and wide hips. 

Estrogen is made when the hypothalamus inside the brain releases Gonadotropin Releasing Hormone, which prompts the pituitary gland to squirt out Luteinizing Hormone and Follicle-Stimulating Hormone into the bloodstream, where they travel the the ovary, to, well… stimulate some follicles in the gonads! Egg follicles inside the ovary make estrogen, which also goes into your bloodstream. During the menstrual cycle, estrogen triggers ovulation and helps build up the uterine walls.