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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
From the M-W Editors
Recent Examples of progesterone from the Web
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Several California clinics advertise the therapy, claiming to be able to undo the effects of the first dose containing mifepristone, which blocks progesterone production and causes the uterine lining to shed.
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In response, the cells secreted levels of estrogen and progesterone found in a typical menstrual cycle—including during ovulation—replicating the signaling that occurs among different female reproductive organs.
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But her progesterone shots - necessary to keep her pregnancy viable after a series of miscarriages - had been $200 a month.
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The basic unit of the ovary is the follicle, each of which contains a single egg surrounded by the cells that make the hormones estrogen and progesterone.
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In addition to differences between men and women, fluctuations in estrogen and progesterone throughout women’s menstrual cycles also affect their physiology, Legato says.
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Most mammals—including humans—experience a surge of the hormones estrogen and progesterone when their bodies are preparing for a pregnancy.
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The ovaries slow down their output of estrogen, progesterone, and androgens.
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.
Origin and Etymology of progesterone
progestin + -sterone
PROGESTERONE Defined for English Language Learners
progesterone
playDefinition of progesterone for English Language Learners
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medical : a substance (called a hormone) that occurs naturally in women and female animals
Medical Dictionary
progesterone
playMedical 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
Learn More about progesterone
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See words that rhyme with progesterone Spanish Central: Translation of progesterone Nglish: Translation of progesterone for Spanish speakers Britannica.com: Encyclopedia article about progesterone
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