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progesterone
noun
pro·ges·ter·one prō-ˈje-stə-ˌrōn 
: a female steroid sex hormone C21H30O2 that is secreted by the corpus luteum to prepare the endometrium for implantation and later by the placenta during pregnancy to prevent rejection of the developing embryo or fetus
also : a synthetic steroid resembling progesterone in action
Example Sentences
Recent Examples on the Web Mifepristone blocks the hormone progesterone and stops the pregnancy from continuing. 
Grace Shih, Chron, 27 July 2022 Also known as the morning-after pill, Plan B is a progesterone medication that delays ovulation to help prevent a pregnancy in the first place. Erica Sweeney, Good Housekeeping, 24 June 2022 This required scheduling an appointment with a doctor who could prescribe her one pill to block progesterone and stop the growth of the fetus, and four other pills to prompt contractions. Stephania Taladrid, The New Yorker, 13 June 2022 During the luteal phase, sesame seeds help support progesterone production, says Bippen. Ali Francis, Bon Appétit, 27 May 2022 First, there’s a rise in pregnenolone and progesterone. Joshua Hawkins, BGR, 19 May 2022 Without progesterone, the lining of the uterus breaks down and pregnancy cannot continue. Abby Dupes, Seventeen, 19 May 2022 However, some people who cannot take estrogen may still be eligible for progesterone-only solutions, according to Yen. Kim Elsesser, Forbes, 18 May 2022 Women with high-risk pregnancies could proactively monitor their progesterone levels and, if needed, reach an emergency room in time to prevent a miscarriage. Ron Erickson, Forbes, 8 Aug. 2022 See More
Grace Shih, Chron, 27 July 2022 Also known as the morning-after pill, Plan B is a progesterone medication that delays ovulation to help prevent a pregnancy in the first place. Erica Sweeney, Good Housekeeping, 24 June 2022 This required scheduling an appointment with a doctor who could prescribe her one pill to block progesterone and stop the growth of the fetus, and four other pills to prompt contractions. Stephania Taladrid, The New Yorker, 13 June 2022 During the luteal phase, sesame seeds help support progesterone production, says Bippen. Ali Francis, Bon Appétit, 27 May 2022 First, there’s a rise in pregnenolone and progesterone. Joshua Hawkins, BGR, 19 May 2022 Without progesterone, the lining of the uterus breaks down and pregnancy cannot continue. Abby Dupes, Seventeen, 19 May 2022 However, some people who cannot take estrogen may still be eligible for progesterone-only solutions, according to Yen. Kim Elsesser, Forbes, 18 May 2022 Women with high-risk pregnancies could proactively monitor their progesterone levels and, if needed, reach an emergency room in time to prevent a miscarriage. Ron Erickson, Forbes, 8 Aug. 2022 See More Word History
Etymology
blend of progestin and luteosterone (borrowed from German Luteosteron, from luteo- luteo- + -steron -sterone), both earlier names for progesterone
Note: The name resulted from a compromise between researchers associated with the earlier names, the American gynecologist Willard M. Allen and embryologist George Washington Corner, and the German biochemists Adolph Butenandt and Karl Heinrich Slotta. See W. M. Allen, A. Butenandt, G. W. Corner, and K. H. Slotta, "Nomenclature of Corpus Luteum Hormone," Nature, vol. 136, number 303 (September 1, 1935), p. 303.
First Known Use
1935, in the meaning defined above
Time Traveler
The first known use of progesterone was in 1935 👨🏻🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
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