luteinizing hormone

noun

: a hormone secreted by the anterior lobe of the pituitary gland that in the female stimulates ovulation and the development of corpora lutea and in the male the development of interstitial tissue in the testis

Example Sentences

Recent Examples on the Web Progesterone’s main mechanism of action is to prevent ovulation by inhibiting the secretion of follicle-stimulating hormone and luteinizing hormone in your blood. Anuradha Varanasi, Forbes, 8 June 2022 The burst of estrogen toward the end of the follicular phase causes a surge in luteinizing hormone on day 15 to initiate ovulation. Jason Karp, Outside Online, 14 Mar. 2014 Modern Fertility’s product, with the help of its app, gives a specific value of the luteinizing hormone that leads to ovulation and tracks its level over time, instead of giving just a simple positive or negative. Beth Kowitt, Fortune, 17 June 2020 Or, your doctor might tell you to continue measuring the level of luteinizing hormone (which peaks 24 to 48 hours before ovulation) in your urine with an at-home test. Christina Caron, New York Times, 18 Apr. 2020 Here’s how that might work: The pituitary gland regulates levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which then prepare ovarian follicles for maturation. Mary Claire Lagroue, SELF, 12 Sep. 2019 The kits detect the presence and concentration of luteinizing hormone in urine, with levels of the hormone surging from 12 to 36 hours before ovulation. Mandy Behbehani, SFChronicle.com, 30 July 2019 Insulin resistance may also affect how the pituitary gland regulates your levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), both of which prepare those ovarian follicles for maturation. Mary Claire Lagroue, SELF, 23 Apr. 2019 Levonorgestrel decreases in efficacy over time and doesn’t work as effectively after a sharp uptick of luteinizing hormone (LH) tells one of your ovaries to release an egg for fertilization. Natasha Lavender, SELF, 8 Apr. 2019 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'luteinizing hormone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1931, in the meaning defined above

Time Traveler
The first known use of luteinizing hormone was in 1931

Dictionary Entries Near luteinizing hormone

Cite this Entry

“Luteinizing hormone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/luteinizing%20hormone. Accessed 5 Dec. 2022.

Kids Definition

luteinizing hormone

noun

lu·​tein·​iz·​ing hormone
ˈlüt-ē-ə-ˌnī-ziŋ-
: a hormone produced by the pituitary gland that in the female stimulates ovulation and the development of the corpora lutea and in the male stimulates production of testosterone by certain cells in the testis

Medical Definition

luteinizing hormone

noun

: a glycoprotein hormone that is secreted by the adenohypophysis and that in the female stimulates ovulation and the development of the corpora lutea and together with follicle-stimulating hormone the secretion of estrogen from developing ovarian follicles and in the male the development of interstitial tissue in the testis and the secretion of testosterone
abbreviation LH

called also interstitial-cell stimulating hormone, lutropin

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