luteinizing hormone

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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.

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]


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.

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.
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

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.
References in periodicals archive ?
These include--different ovarian stimulation protocols, double insemination and prevention of premature LH surge.
Background: The purpose of this study was to evaluate whether clinical pregnancy rate is affected by timing intrauterine insemination (IUI) according to serum LH surge, r-hCG trigger, or a combination of LH surge and r-hCG trigger in controlled ovarian hyperstimulation (COH) cycles for patients with a variety of infertility etiologies.
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).
The anti-progesterone RU486 also induces a reduction in the amount of ovulatory LH released as well as inadequate follicular development at the time of the LH surge and a dual mechanism has been suggested for the an ovulatory action of RU486 in rats on the basis of this evidence.
Successful treatment of empty follicle syndrome by triggering endogenous LH surge using GnRH agonist in an antagonist down-regulated IVF cycle.
In present study, response to estrus was very poor and probably the role of GnRH is more towards ovulation caused by LH surge and initial FSH concentration for sufficient follicular development was absent in this group.
There is no benefit to giving human chorionic gonadotropin (hCG) if the patient has a spontaneous LH surge.
If couples are only trying to conceive following the LH surge they many find it difficult to get pregnant.