Estrogen, or oestrogen, is a category of sex hormone responsible for the development and regulation of the female reproductive system and secondary sex characteristics. There are three major endogenous estrogens that have estrogenic hormonal activity: estrone (E1), estradiol (E2), and estriol (E3). Estradiol, an estrane, is the most potent and prevalent. Another estrogen called estetrol (E4) is produced only during pregnancy. Estrogens are synthesized in all vertebrates and some insects. Their presence in both vertebrates and insects suggests that estrogenic sex hormones have an ancient evolutionary history. Quantitatively, estrogens circulate at lower levels than androgens in both men and women. While estrogen levels are significantly lower in males compared to females, estrogens nevertheless have important physiological roles in males.Like all steroid hormones, estrogens readily diffuse across the cell membrane. Once inside the cell, they bind to and activate estrogen receptors (ERs) which in turn modulate the expression of many genes. Additionally, estrogens bind to and activate rapid-signaling membrane estrogen receptors (mERs), such as GPER (GPR30).In addition to their role as natural hormones, estrogens are used as medications, for instance in menopausal hormone therapy, hormonal birth control and feminizing hormone therapy for transgender women and nonbinary people.
Related Searches

If you like estrogen, try these related items.

Similar Topics

Customers looking for estrogen also searched for:

Sponsored Links
Banner 1
Feme Support Menopause Alternative Progesterone Estrogen HRT Hormone Replacement
Feme Support Menopause Alternative Progesterone Estrogen HRT Hormone Replacement
Price:
12.00 USD
Ends:
May 08, 12:26 am
60 Female Hormone Phyto estrogen Pills capsules Transsexual man transgender NEW
60 Female Hormone Phyto estrogen Pills capsules Transsexual man transgender NEW
Price:
12.69 USD
Ends:
May 13, 06:40 pm
DIM Supplement Plus BioPerine for Menopause, PCOS, Estrogen Metabolism & Balance
DIM Supplement Plus BioPerine for Menopause, PCOS, Estrogen Metabolism & Balance
Price:
18.95 USD
Ends:
May 01, 11:52 pm
Menopause Relief,Dim Supplement,Hot Flash,Hormone Estrogen Balance,PCOS Blocker
Menopause Relief,Dim Supplement,Hot Flash,Hormone Estrogen Balance,PCOS Blocker
Price:
22.99 USD
Ends:
Apr 20, 09:31 pm
Estrogen/Estriol Cream, For Menopausal Relief (Bio-Identical) 3.5oz Pump
Estrogen/Estriol Cream, For Menopausal Relief (Bio-Identical) 3.5oz Pump
Price:
23.95 USD
Ends:
May 05, 03:55 pm
Nutrivein DIM Supplement 400mg - Menopause, PCOS, Estrogen Metabolism & Balance
Nutrivein DIM Supplement 400mg - Menopause, PCOS, Estrogen Metabolism & Balance
Price:
16.99 USD
Ends:
Apr 21, 05:33 pm
Herbal Feminizer Pills Female Hormone Estrogen Breast Enlargement made in USA
Herbal Feminizer Pills Female Hormone Estrogen Breast Enlargement made in USA
Price:
10.99 USD
Ends:
Apr 30, 12:25 am
HERBAL FEMINIZER SEX CHANGE Capsules Female Hormone Estrogen Breast Enlargement
HERBAL FEMINIZER SEX CHANGE Capsules Female Hormone Estrogen Breast Enlargement
Price:
12.48 USD
Ends:
May 09, 02:18 pm
Menopause Relief Supplement Pills Estrogen Balance Hot Flashes Support 60 Caps
Menopause Relief Supplement Pills Estrogen Balance Hot Flashes Support 60 Caps
Price:
12.95 USD
Ends:
Apr 26, 12:30 am
PUERARIA FEMINIZER Breast Enlargement Female Hormone Pills Oestrogen Transsexual
PUERARIA FEMINIZER Breast Enlargement Female Hormone Pills Oestrogen Transsexual
Price:
13.21 USD
Ends:
May 13, 06:21 pm
2 x PUERARIA FEMINIZER Breast Enlargement Female Hormone Oestrogen Transsexual
2 x PUERARIA FEMINIZER Breast Enlargement Female Hormone Oestrogen Transsexual
Price:
15.47 USD
Ends:
May 05, 02:39 am
XZEN Estroxzen Menopause Relief Estrogen Balance Pills Less Mood Swings  60 Caps
XZEN Estroxzen Menopause Relief Estrogen Balance Pills Less Mood Swings 60 Caps
Price:
19.95 USD
Ends:
Apr 21, 06:40 pm
AlphaFX Testosterone Booster, Estrogen Blocker, Horny Goat Weed, Tribulus
AlphaFX Testosterone Booster, Estrogen Blocker, Horny Goat Weed, Tribulus
Price:
19.95 USD
Ends:
May 12, 09:00 pm
DIM Supplement Plus BioPerine for Menopause, PCOS, Estrogen Metabolism & Balance
DIM Supplement Plus BioPerine for Menopause, PCOS, Estrogen Metabolism & Balance
Price:
16.99 USD
Ends:
Apr 28, 07:57 pm
30 Female Hormone Phyto estrogen Pills capsules Transsexual man transgender NEW
30 Female Hormone Phyto estrogen Pills capsules Transsexual man transgender NEW
Price:
15.99 USD
Ends:
May 15, 10:33 pm
Womens Balance Support Supplement for Hormone PCOS Estrogen Adrenal Support 60ct
Womens Balance Support Supplement for Hormone PCOS Estrogen Adrenal Support 60ct
Price:
9.99 USD
Ends:
May 04, 03:00 pm
DIM Supplement 255 MG BioPerine for Menopause, PCOS, Estrogen Metabolism&Balance
DIM Supplement 255 MG BioPerine for Menopause, PCOS, Estrogen Metabolism&Balance
Price:
18.97 USD
Ends:
May 01, 03:19 am
TestdroGEN Testosterone Booster, Estrogen Blocker, Enhance Libido, Longjack Maca
TestdroGEN Testosterone Booster, Estrogen Blocker, Enhance Libido, Longjack Maca
Price:
23.95 USD
Ends:
May 11, 12:45 am
FEMINIZER Ladyboy SEX CHANGE Capsules Female Hormone Estrogen Breast Enlargement
FEMINIZER Ladyboy SEX CHANGE Capsules Female Hormone Estrogen Breast Enlargement
Price:
14.99 USD
Ends:
May 10, 06:32 pm
▶DIM Supplement Pills BioPerine for Menopause, PCOS, Estrogen Metabolism&Balance
▶DIM Supplement Pills BioPerine for Menopause, PCOS, Estrogen Metabolism&Balance
Price:
18.97 USD
Ends:
May 01, 03:37 am