oestrogen

oestrogen
n.
one of a group of steroid hormones (including oestriol, oestrone, and oestradiol) that control female sexual development, promoting the growth and function of the female sex organs (see menstrual cycle) and female secondary sexual characteristics (such as breast development). Oestrogens are synthesized mainly by the ovary; small amounts are also produced by the adrenal cortex, testes, and placenta. In men excessive production of oestrogen gives rise to feminization.
Naturally occurring and synthetic oestrogens, given by mouth or injection, are used to treat amenorrhoea and menopausal symptoms (see hormone replacement therapy), as well as androgen-dependent cancers (e.g. cancer of the prostate). Synthetic oestrogens are a major constituent of oral contraceptives. Side-effects of oestrogen therapy may include nausea and vomiting, headache and dizziness, irregular vaginal bleeding, fluid and salt retention, and feminization in men. Oestrogens should not be used in patients with a history of cancer of the breast, uterus, or genital tract.
Derivatives:
oestrogenic adj.

The new mediacal dictionary. 2014.

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  • oestrogen — [ēs′trə gən, es′trə gən] n. Brit. var. of ESTROGEN * * * oes·tro·gen (ĕsʹtrə jən) n. Variant of estrogen. * * * …   Universalium

  • oestrogen — OESTROGÉN s.n. v. estrogen. Trimis de LauraGellner, 13.09.2007. Sursa: DN …   Dicționar Român

  • oestrogen — (n.) see ESTROGEN (Cf. estrogen) …   Etymology dictionary

  • oestrogen — (US estrogen) ► NOUN ▪ any of a group of steroid hormones which promote the development and maintenance of female characteristics of the body. ORIGIN from OESTRUS(Cf. ↑oestrus) …   English terms dictionary

  • oestrogen — [ēs′trə gən, es′trə gən] n. Brit. var. of ESTROGEN …   English World dictionary

  • oestrogen — [[t]i͟ːstrəʤ(ə)n, AM e̱ [/t]] N UNCOUNT Oestrogen is a hormone produced in the ovaries of female animals. Oestrogen controls the reproductive cycle and prepares the body for pregnancy. As ovulation gets nearer, oestrogen levels rise. (in AM and… …   English dictionary

  • oestrogen — SYN: estrogen. * * * n. one of a group of steroid hormones (including oestriol, oestrone, and oestradiol) that control female sexual development, promoting the growth and function of the female sex organs (see menstrual cycle) and female… …   Medical dictionary

  • oestrogen receptor — a specific site on the surface of a cell that binds to oestrogen; the binding triggers responses of the cell to the hormone (see receptor). Oestrogen receptors occur on all target cells normally responsive to oestrogen (e.g. in the uterus) and… …   The new mediacal dictionary

  • oestrogen receptor — a specific site on the surface of a cell that binds to oestrogen; the binding triggers responses of the cell to the hormone. anti oestrogen, used for treating breast cancer, act by preventing the binding of oestrogen to these receptor …   Medical dictionary

  • oestrogen-receptor antagonist — see anti oestrogen …   The new mediacal dictionary

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