
A reproductive cycle in some female mammals (but not female humans, who instead have menstrual cycles). The cycle is characterised by a short period of intense sexual desire (called estrus or heat) when the animal is fertile, which often occurs only once or twice a year, and involves correlating physical changes of the reproductive tract. ... (09 O...
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http://www.encyclo.co.uk/local/20973

(es;trus) Cyclic changes in the structure and function of the ovaries and female reproductive tract of mammals other than humans, accompanied by periods of "heat" (estrus) or sexual receptivity. Estrus is the equivalent of the human menstrual cycle but differs from the human menstrual cycle in that the endometrium is not shed with accompanying ble...
Found on
http://www.mhhe.com/biosci/abio/glossary.mhtml

the reproductive cycle of the female.
Found on
http://www.sheep101.info/201/glossary.html

A recurring 14 to 16 day cycle when a doe is more apt to conceive, usually 2 days infertile, the following 10 to 12 days fertile and 2 days infertile at the end end of the cycle
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https://quitebunnyrabbitry.weebly.com/glossary.html#
No exact match found.