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progestin vs. progesterone

[ proh-jes-tin ]
/ proʊˈdʒɛs tɪn /

noun
  1. any substance having progesteronelike activity.
[ proh-jes-tuh-rohn ]
/ proʊˈdʒɛs təˌroʊn /

noun
  1. a hormone, C21H30O2, that prepares the uterus for the fertilized ovum and maintains pregnancy.
  2. a commercial form of this compound, obtained from the corpus luteum of pregnant sows or synthesized: used in the treatment of dysfunctional uterine bleeding, dysmenorrhea, threatened or recurrent abortion, etc.

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