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Estradiol is not produced in the gonads only; in particular, fat cells produce active precursors to estradiol, and will continue to do so even after menopause. [51] Estradiol is also produced in the brain and in arterial walls. In men, approximately 15 to 25% of circulating estradiol is produced in the testicles.
Average number of moderate-to-severe hot flashes per week with placebo and different doses of oral estradiol in menopausal women [40] [41]. Estradiol is used in menopausal hormone therapy to prevent and treat moderate to severe menopausal symptoms such as hot flashes, vaginal dryness and atrophy, and osteoporosis (bone loss). [11]
Treatment with unopposed estrogen (i.e., an estrogen alone without a progestogen) is contraindicated if the uterus is still present, due to its proliferative effect on the endometrium. The WHI also found a reduced incidence of colorectal cancer when estrogen and a progestogen were used together, and most importantly, a reduced incidence of bone ...
Topical estrogen creams have been touted as a solution to skin aging due to menopause for decades— but they may not be right for you. Topical estrogen creams have been touted as a solution to ...
Bioidentical hormones were first used for menopausal symptom relief in the 1930s, [2] after Canadian researcher James Collip developed a method to extract an orally active estrogen from the urine of pregnant women and marketed it as the active agent in a product called Emmenin. [3]
[7] [5] [6] Estradiol acetate is an estrogen and hence is an agonist of the estrogen receptor, the biological target of estrogens like estradiol. [8] [9] It is an estrogen ester and a prodrug of estradiol in the body. [9] [8] Because of this, it is considered to be a natural and bioidentical form of estrogen. [9] [10]
Estradiol is a naturally occurring and bioidentical estrogen, or an agonist of the estrogen receptor, the biological target of estrogens like endogenous estradiol. [10] Due to its estrogenic activity, estradiol has antigonadotropic effects and can inhibit fertility and suppress sex hormone production in both women and men.
A stronger suppression of testosterone levels was observed in men following daily treatment with a combined oral contraceptive containing 50 μg ethinylestradiol and 0.5 mg norgestrel for 9 days. [8] However, investigation revealed that the progestin was the more important component responsible for the suppression in testosterone levels. [ 8 ]