proestrus

noun
pro·​es·​trus | \ (ˌ)prō-ˈe-strəs How to pronounce proestrus (audio) \

Definition of proestrus

: a period immediately preceding estrus characterized by preparatory physiological changes

First Known Use of proestrus

1906, in the meaning defined above

History and Etymology for proestrus

New Latin

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The first known use of proestrus was in 1906

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Cite this Entry

“Proestrus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/proestrus. Accessed 2 Mar. 2021.

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proestrus

noun
pro·​es·​trus | \ -ˈes-trəs How to pronounce proestrus (audio) \
variants: or proestrum \ -​ˈes-​trəm How to pronounce proestrus (audio) \ or chiefly British pro-oestrus or pro-oestrum \ -​ˈēs-​ How to pronounce proestrus (audio) \

Medical Definition of proestrus

: a preparatory period immediately preceding estrus and characterized by growth of graafian follicles, increased estrogenic activity, and alteration of uterine and vaginal mucosa

More from Merriam-Webster on proestrus

Britannica.com: Encyclopedia article about proestrus

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