luteinizing hormone


luteinizing hormone
   (LH)
   This is a sugar-bearing protein manufactured by the anterior pituitary. Like a lot of the pituitary hormones, it surges on and off, since constant secretion would overload and deaden receptors. In women, it builds up after menses, stimulating the release of estrogen from the ovaries. Estrogen in turn stimulates the hypothalamus to increase its stimulation of LH from the pituitary, until, a day or two before ovulation, they produce a guitar-amp feedback, and the cells that produce LH start to surge follicle-stimulating hormone (FSH). The egg pops, being replaced by the corpus luteum, which produces progesterone for the next eleven to twelve days. Progesterone inhibits and lowers LH levels, as well as inhibiting levels of estrogen already being produced by the young follicles that will produce next month's egg. In men, LH is responsible for stimulation of testosterone, although FSH and the testes hormone inhibin are responsible for both the production of sperm and controlling testosterone.

Herbal-medical glossary. 2015.

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  • Luteinizing hormone — beta polypeptide Identifiers Symbol LHB Entrez 3972 HUGO …   Wikipedia

  • luteinizing hormone — (Amer.) n. LH, gonadotropic hormone secreted by the pituitary gland stimulating maturation of eggs and development of the corpus luteum in females and sperm in males (also luteinising hormone) …   English contemporary dictionary

  • luteinizing hormone — n. a hormone, secreted by the anterior lobe of the pituitary gland, which stimulates ovulation, the development of the corpus luteum with its subsequent secretion of progesterone in females, the development of interstitial tissue, and the… …   English World dictionary

  • luteinizing hormone — luteinizing hormone. См. лютеинизирующий гормон. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Luteinizing hormone — A hormone released by the pituitary gland in response to luteinizing hormone releasing hormone. Abbreviated LH, it controls the length and sequence of the female menstrual cycle, including ovulation, preparation the uterus for implantation of a… …   Medical dictionary

  • Luteinizing hormone — Hormone lutéinisante Pour les articles homonymes, voir LH. Hormone lutéinisante Général No CAS …   Wikipédia en Français

  • luteinizing hormone — A glycoprotein hormone (26 kD) and gonadotropin. Made up of an a chain (96 amino acids) identical to other gonadotropins, and a hormone specific b chain. Acts with follicle timulating hormone to stimulate sex hormone release …   Dictionary of molecular biology

  • luteinizing hormone — Biochem. See LH. [1930 35] * * * also called  interstitial cell stimulating hormone (ICSH)        one of two gonadotropic hormones (i.e., hormones concerned with the regulation of the gonads, or sex glands) that is produced by the pituitary gland …   Universalium

  • luteinizing hormone — or luteinising hormone lu:tənʌɪzɪŋ noun Biochemistry a pituitary glycoprotein hormone that stimulates ovulation in females and the synthesis of androgen in males …   English new terms dictionary

  • luteinizing hormone — LH a hormone (see gonadotrophin), synthesized and released by the anterior pituitary gland, that stimulates ovulation, corpus luteum formation, progesterone synthesis by the ovary (see also menstrual cycle), and androgen synthesis by the… …   The new mediacal dictionary