Final answer:
The three types of estrogen are estradiol, estrone, and estriol, which are key sex hormones produced largely by the ovaries in females, with estradiol being the most potent.
Step-by-step explanation:
The three types of estrogen are estradiol, estrone, and estriol. These are sex hormones produced predominantly in females by the ovaries. Estradiol is considered the most potent form of estrogen and is primarily responsible for the development of female reproductive organs and secondary sexual characteristics. Estrone and estriol have various roles in the body as well but are less potent than estradiol. Progesterone is another important hormone that prepares the uterus for pregnancy and maintains it. Although all individuals produce some amounts of estrogen, androgens like testosterone are male sex hormones and are produced in higher quantities in males. Testosterone is responsible for the development of male secondary sex characteristics such as facial hair and muscle strength.