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
Examples of progesterone in a Sentence
Recent Examples on the Web
According to the outlet, Howlett said she and Julie Howlett had been married for four years and were both transitioning to female while taking estrogen and progesterone.
—
Stepheny Price,
FOXNews.com,
2 July 2026
Another option is switching to a medication that contains progestin, a synthetic form of progesterone.
—
Cathy Nelson,
Health,
1 July 2026
The theory is that this combination may help keep histamine in check, basically replacing the effect of progesterone.
—
Theara Coleman,
TheWeek,
1 July 2026
Wurth saw two more physicians who refused to discuss hormones before a urologist started her on estrogen gel, oral progesterone and a vaginal estrogen cream.
—
Laura Trujillo,
USA Today,
30 June 2026
See All Example Sentences for progesterone
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Stepheny Price,
FOXNews.com,
2 July 2026
Another option is switching to a medication that contains progestin, a synthetic form of progesterone.
—
Cathy Nelson,
Health,
1 July 2026
The theory is that this combination may help keep histamine in check, basically replacing the effect of progesterone.
—
Theara Coleman,
TheWeek,
1 July 2026
Wurth saw two more physicians who refused to discuss hormones before a urologist started her on estrogen gel, oral progesterone and a vaginal estrogen cream.
—
Laura Trujillo,
USA Today,
30 June 2026
See All Example Sentences for progesterone
Cite this Entry
“Progesterone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/progesterone. Accessed 6 Jul. 2026.
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
Note: Synthetic steroids (such as progestins) that function similarly in the body are sometimes also referred to as progesterones.
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