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
Examples of progesterone in a Sentence
Recent Examples on the Web
The monthly injections stop her body’s production of estrogen and progesterone.
—
Kayla Grant, People.com, 29 July 2025
Rising progesterone levels prompt your uterine lining to thicken.
—Laura Dorwart, Verywell Health, 8 July 2025
After pregnancy, progesterone levels nosedive, which can drain your energy levels and mental health.
—Julia Ries, SELF, 23 June 2025
This may happen due to hormonal issues, such as low progesterone, or problems with the way your endometrium (uterine lining) responds to progesterone.
—Laura Dorwart, Verywell Health, 8 July 2025
See All Example Sentences for progesterone
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Kayla Grant, People.com, 29 July 2025
Rising progesterone levels prompt your uterine lining to thicken.
—Laura Dorwart, Verywell Health, 8 July 2025
After pregnancy, progesterone levels nosedive, which can drain your energy levels and mental health.
—Julia Ries, SELF, 23 June 2025
This may happen due to hormonal issues, such as low progesterone, or problems with the way your endometrium (uterine lining) responds to progesterone.
—Laura Dorwart, Verywell Health, 8 July 2025
See All Example Sentences for progesterone
Cite this Entry
“Progesterone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/progesterone. Accessed 5 Aug. 2025.
Copy CitationKids Definition
progesterone
noun
pro·ges·ter·one
prō-ˈjes-tə-ˌrōn
: a hormone that is produced by the corpus luteum and causes the uterus to change so that it provides a suitable environment for a fertilized egg
Medical Definition
progesterone
noun
pro·ges·ter·one
prō-ˈjes-tə-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
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