Search results

...n [[animal]] engages in some activity (as migrating or [[mating]]); also : estrus, heat (3) : the period [[normally]] characterized by a particular kind of [

...except man will mate only during their fertile period, which is known as [[estrus]], or heat..." However, in most instances, humans have sex primarily for p ...[private]]. Furthermore, human sexual activity is not linked to periods of estrus and can take place at any time during the reproductive cycle, even during p

...on in humans and other great apes and reabsorbed in other mammals in the [[estrus cycle]].

...ce. It is something that is regulated in animals because they are only in estrus during certain times of the year. Were this not so, your world would be ov

...One important physiological change in humans was the evolution of hidden estrus or [[concealed ovulation]] in females, which may have coincided with the ev