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progesterone Syllabification: pro·ges·ter·one
Pronunciation: /prōˈjestəˌrōn/

Definition of progesterone in English:


A steroid hormone released by the corpus luteum that stimulates the uterus to prepare for pregnancy.
Example sentences
  • You stick it on your skin and it releases two hormones - oestrogen and progesterone.
  • During pregnancy, the amount of two female hormones, oestrogen and progesterone, increases.
  • The ovaries also produce the female hormones, oestrogen and progesterone.


1930s: blend of progestin and the German synonym Luteosteron (from corpus luteum + sterol).

Definition of progesterone in:
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