progesterone

noun

pro·ges·ter·one | \ prō-ˈje-stə-ˌrōn

Definition of progesterone

: 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

Examples of progesterone in a Sentence

Recent Examples on the Web Mifepristone is a drug that blocks progesterone, which is needed for a pregnancy to continue. — Joshua Cohen, Forbes, 2 June 2022 That’s largely thanks to a hormone that helps prep your body for pregnancy called progesterone. — Korin Miller, SELF, 18 May 2022 Mifepristone blocks progesterone, a hormone required for a pregnancy to continue. — Peter Weber, The Week, 12 May 2022 The first pill in the regimen, mifepristone, blocks progesterone, a hormone that supports pregnancy. — Aria Bendix, NBC News, 12 May 2022 Mifepristone is taken first to block the effects of progesterone, a hormone needed to sustain a pregnancy. — Jennifer Haberkornstaff Writer, Los Angeles Times, 5 May 2022 Existing birth control pills — based on the hormones estrogen and progesterone — prevent ovulation, the final stage in a follicle’s life cycle where an egg is released from the ovary to potentially become fertilized. — Ryan Cross, BostonGlobe.com, 19 May 2022 The first pill, mifepristone, acts to block the body's ability to absorb progesterone, a hormone that allows the pregnancy to grow. — Elizabeth Weise, USA TODAY, 7 May 2022 Amaon, a family doctor, started conducting telehealth appointments and arranging for pharmacies to send the pills—mifepristone, to block progesterone, and misoprostol, to cause contractions—by mail. — Peter Slevin, The New Yorker, 7 May 2022 See More

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