estrone

"With weight loss, production of estrone decreases, so circulating estradiol is more effective," Taylor said, and this is why overweight women may have more severe symptoms than women who are thinner.

As women age, the key hormones their bodies naturally produce — estrogen, which is a group of hormones that includes estriol, estradiol and estrone, as well as progesterone and testosterone — may fluctuate or decline.