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Estrogens are hormones that are important for sexual and reproductive development, mainly in women. They are also referred to as female sex hormones. The term “estrogen” refers to all of the chemically similar hormones in this group, which are estrone, estradiol (primary in women of reproductive age) and estriol.

 

In women, estrogen is produced mainly in the ovaries, but it is also produced by fat cells and the adrenal gland. Estrogen is involved in the onset of puberty, playing a role in the development of so-called secondary sex characteristics, such as breasts, and pubic and armpit hair.

Estrogen also helps regulate the menstrual cycle, controlling the growth of the uterine lining during the first part of the cycle. If the woman’s egg is not fertilized, estrogen levels decrease sharply and menstruation begins. If the egg is fertilized, estrogen works with progesterone, another hormone, to stop ovulation during pregnancy.

 

Estrogen is produced by the ovaries and in smaller amounts by the adrenal cortex (The outer segment of the adrenal gland located on top of each kidney), testes (testicles) and fetoplacental unit (the fetus and the placenta).

Estrogen is considered to be the “female” hormone, whereas testosterone is considered the “male” hormone. However, both hormones are present in both sexes.1

Estrogen hormones play an essential role in the growth and development of female secondary sexual characteristics such as breasts, pubic and armpit hair, endometrium, regulation of the menstrual cycle and the reproductive system. During the menstrual cycle, estrogen acts to produce an environment suitable for fertilization, implantation, and nutrition of the early embryo.

In males, estrogen assists in maturation of sperm and has importance for normal male reproduction. Aspects of pubertal development in boys (growth of the long bones, their mineralization and epiphyseal closure) attributed to the actions of androgens are now recognized as being mediated in part by estrogen.2 The final steps of spermatid maturation, spermiogenesis, appear to be particularly sensitive and dependent upon estrogen.3

Uses for estrogen include:

 

 

 Deutsch

östradiol

Progesteron

Hormonbehandlung bei Männern

körperidentische Hormone

Therapieprogramm

Natürliches östrogen

Unsterblichkeit

ewige Jugend