luteinizing hormone

(redirected from LH surge)
Also found in: Thesaurus, Medical, Encyclopedia.

lu·te·in·iz·ing hormone

n. Abbr. LH
A hormone produced by the anterior lobe of the pituitary gland that stimulates ovulation and the development of the corpus luteum in the female and the production of testosterone by the interstitial cells of the testis in the male.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

luteinizing hormone

(Biochemistry) a gonadotrophic hormone secreted by the anterior lobe of the pituitary gland. In female vertebrates it stimulates ovulation, and in mammals it also induces the conversion of the ruptured follicle into the corpus luteum. In male vertebrates it promotes maturation of the interstitial cells of the testes and stimulates androgen secretion. Abbreviation: LH Also called: interstitial cell-stimulating hormone See also follicle-stimulating hormone, prolactin
[C19: from Latin lūteum egg yolk, from lūteus yellow]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


luteinizing hormone: a pituitary hormone that acts in the ovary to stimulate ripening of the follicle and formation of the corpus luteum.


also L.H.,

1. left hand.
2. lower half.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

luteinizing hormone

(LH) A hormone that in females helps to make ova mature and triggers ovulation, and in males makes testes produce testosterone. LH comes from the pituitary gland and acts with FSH. See folliclestimulating hormone.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.luteinizing hormone - a gonadotropic hormone that is secreted by the anterior pituitary; stimulates ovulation in female mammals and stimulates androgen release in male mammals
gonadotrophic hormone, gonadotrophin, gonadotropic hormone, gonadotropin - hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

lu·te·i·niz·ing hor·mone

n. hormona luteinizante producida por la pituitaria anterior que estimula la secreción de hormonas sexuales por los testículos (testosterona) y el ovario (progesterona) e interviene en la formación de esperma y óvulos.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
LH surge causes ovulation and during secretory phase causes luteinisation of granulosa cells to secrete progesterone, which helps in the formation and maintenance of corpus luteum.
In-vivo oocytes recovered theAdegCcurrence of meiosis is due to preovulatory LH surge which is not seen in-vitro when oocytes removal from follicles happened (Grondahl, 2008); (Sirard et al., 2006).
Equally essential is having a reliable digital test reader that not only detects the LH surge that precedes ovulation but also accurately displays that result.
However, the GnRHa induced surge differs with that of natural cycle LH surge in both the duration and profile (6).
LH and FSH leading to depression might also be the reasons for women being prone to depression, especially LH, whose release surges up during ovulation in the menstrual cycle [12], and LH detection is used to detect ovulation, which occurs about 24-48 hours after the LH surge. In all, LH release increase might be the reason for depression at both the ovulaton in the menstrual cycle and menopause.
After LH surge, ovulation occurs in the night of oestrus.
The LH surge is associated with an increase in estrogen, and the maturing of the follicle.
The short duration of the LH surge with the GnRH agonist trigger of approximately thirty-four hours has been shown to be beneficial for preventing OHSS in GnRH antagonist IVF cycles, when compared with the prolonged elevation of hCG ([greater than or equal to]6 days) after exposure to an hCG bolus (12).
Besides, versican was also shown to be present in the expanded COC matrix and was induced by LH surge, consistent with the activity and localization of ADAMTS-1 (18,19).
Administration of GnRH at estrus can decrease variable time of LH surge and ovulation rate to improve reproductive performances in ewes (Eppleston and Roberts, 1991).
It was found that endotoxin delayed the time to an experimentally induced LH surge in ovariectomized ewes but did not alter surge amplitude, duration, or incidence.