estrous cycle(redirected from Oestrus cycles)
Also found in: Medical, Encyclopedia.
The recurrent set of physiological and behavioral changes that take place from one period of estrus to another.
a series of physiological changes in sexual and other organs in female mammals, extending from one period of heat to the next.
The series of bodily changes that occur in the female of most mammals from one period of estrus to another. The estrous cycle usually takes place during a specific period known as the breeding season, which ensures that the young are born at a time when the chance of survival is greatest. The length of the cycle varies from species to species.