proestrus

noun
pro·es·trus | \(ˌ)prō-ˈe-strəs \

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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More Definitions for proestrus

proestrus

noun
pro·es·trus | \-ˈes-trəs \
variants: or proestrum \-ˈes-trəm \ or chiefly British pro-oestrus or pro-oestrum \-ˈēs- \

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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