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Testosterone is the primary male sex hormone and androgen in males. [3] In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.
The volumes of sexually dimorphic brain structures in transgender women were found to change and approximate typical female brain structures when exposed to estrogen concomitantly with androgen deprivation over a period of months, [31] suggesting that estrogen and/or androgens have a significant part to play in sex differentiation of the brain ...
Estrogen is associated with edema, including facial and abdominal swelling. Melanin. Estrogen is known to cause darkening of skin, especially in the face and areolae. [38] Pale skinned women will develop browner and yellower skin during pregnancy, as a result of the increase of estrogen, known as the "mask of pregnancy". [39]
Chemical Class Abbreviation Tissue Cells Receptor Target Tissue Effect Testosterone: androgen: testes, ovary: Leydig cells: AR: libido, Anabolic: growth of muscle mass and strength, increased bone density, growth and strength, Virilizing: maturation of sex organs, formation of scrotum, deepening of voice, growth of beard and axillary hair.
Ethinylestradiol is an example of a semi-synthetic estrogen. Specific compounds that have partial agonist activity for steroid receptors may require treatment by a steroid in one cell type, and, therefore, act like natural steroid hormones. These compounds are used in certain medical conditions.
Androstenediol (A5) is a steroid metabolite of DHEA and the precursor to sex hormones testosterone and estradiol. Androsterone is a chemical byproduct created during the breakdown of androgens, or derived from progesterone , that also exerts minor masculinising effects, but with one-seventh the intensity of testosterone.
Estrone is an estrogen, specifically an agonist of the estrogen receptors ERα and ERβ. [1] [5] It is a far less potent estrogen than is estradiol, and as such, is a relatively weak estrogen. [1] [5] [6] Given by subcutaneous injection in mice, estradiol is about 10-fold more potent than estrone and about 100-fold more potent than estriol. [7]
The sex hormones include androgens such as testosterone, estrogens such as estradiol, and progestogens such as progesterone. [1] Sex-hormonal agents may be either steroidal or nonsteroidal in chemical structure and may serve to either enhance, inhibit, or have mixed effects on the function of the sex hormone systems. [2]