Prolactin
You might not have ever heard of prolactin, it might not be sexy, although as you will find, like other hormones it has a direct affect on all of your other hormones.
Prolactin is created by your pituitary gland located in your brain and elevated prolactin levels can suppress ovarian function, thus the production of estradiol, progesterone, and testosterone. In addition to this, elevated prolactin can lead to weight gain, breast enlargement, muscle loss, headaches, depression, and bone loss.