estrus
Noun
Meaning
applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
Source: WordNetSynonyms
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The sounds emanating from the uterine core of the Democratic Party are the subhuman grunts and growls one hears from animals in estrus or mid-feed. Something is terribly wrong with them."
Adult males may kill dependent offspring that are not theirs so the female will return to estrus and thus they can sire offspring of their own.
As with other canines, the ova are shed during estrus without the need for the stimulation of copulating.
Dogs do not experience menopause; the canine estrus cycle simply becomes irregular and infrequent.
Because some animals (such as dogs ) have a bloody discharge during estrus, it was assumed that menstruation was the corresponding most fertile time for women.
Depending on breed, on average, 16% of mares have double ovulations, allowing them to twin, though this does not affect the length of time of estrus or diestrus.