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| pro·ges·ter·one [ prō jéstə rn ] |
noun |
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| Definition: |
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sex hormone: a sex hormone produced in women, first by the corpus luteum of the ovary to prepare the womb for the fertilized ovum, and later by the placenta to maintain pregnancy. C21H30O2
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| [Mid-20th century. <pro-1 + gestation + sterol + -one] |
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