pro-oestrusproestrusn.

Brit.

/prəʊˈiːstrəs/,

/prəʊˈɛstrəs/, U.S.

/proʊˈɛstrəs/

Forms: 1900s– proestrus (chiefly U.S.), 1900s– pro-oestrus.

Origin: Formed within English, by derivation. Etymons: pro- prefix², oestrus n.

Etymology: < pro- prefix² + oestrus n. Compare slightly earlier pro-oestrum n., pro-oestrous adj.

Biology.

The phase of the reproductive cycle in female mammals immediately preceding oestrus, characterized by the growth of ovarian follicles and development of the endometrium. Cf. pro-oestrum n.

ΚΠ

1906 Proc. Royal Soc. B. 77 519 Halban ascribes to this ovarian substance both the growth of the mucous membrane during each pro-oestrus and the swelling of the glands at each oestral period.

1956 Jrnl. Mammalogy 37 438 Four of the females taken during the months July–October were in pro-oestrus or oestrus.

1973 Nature 12 Jan. 129/2 When the drug was administered on other days of the cycle, metoestrus, dioestrus or pro-oestrus, it failed to increase ovulation rate.

1996 W. F. Epling & W. D. Pierce in K. M. Pirke Activity Anorexia viii. 101 Female rats develop running activity faster, and their activity is modulated by the menstrual cycle, reaching a maximum at proestrus.

This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	pro-oestrus
释义	pro-oestrusproestrusn. Brit. /prəʊˈiːstrəs/, /prəʊˈɛstrəs/, U.S. /proʊˈɛstrəs/ Forms: 1900s– proestrus (chiefly U.S.), 1900s– pro-oestrus. Origin: Formed within English, by derivation. Etymons: pro- prefix², oestrus n. Etymology: < pro- prefix² + oestrus n. Compare slightly earlier pro-oestrum n., pro-oestrous adj. Biology. The phase of the reproductive cycle in female mammals immediately preceding oestrus, characterized by the growth of ovarian follicles and development of the endometrium. Cf. pro-oestrum n. ΚΠ 1906 Proc. Royal Soc. B. 77 519 Halban ascribes to this ovarian substance both the growth of the mucous membrane during each pro-oestrus and the swelling of the glands at each oestral period. 1956 Jrnl. Mammalogy 37 438 Four of the females taken during the months July–October were in pro-oestrus or oestrus. 1973 Nature 12 Jan. 129/2 When the drug was administered on other days of the cycle, metoestrus, dioestrus or pro-oestrus, it failed to increase ovulation rate. 1996 W. F. Epling & W. D. Pierce in K. M. Pirke Activity Anorexia viii. 101 Female rats develop running activity faster, and their activity is modulated by the menstrual cycle, reaching a maximum at proestrus. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < n.1906
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