<prompt> Which of the following is not seen in humans:Estrous cycleMenstrual cycleEndometrial cycleOvarian cycle  <response>: A i.e. Estrous cycle- Humans undergo menstrual cycle, ovarian cycle, uterine endometrial cycle, uterine cervx cycle, vaginal cycle, anovulatory cycles and cyclic changes in breast, but not an estrous cycleQ.- Mammals other than primates donot menstruate and their sexual cycle is called an estrous heat cycleQ. It is named for the conspicuous period of heat estrus at the time of ovulation, normally the only time during which sexual interest of female is aroused.FeatureMenstrual cycleEstrous CycleOccurs inMenstruatingNon menstruating mammals inmammals other eluding humans higher prmatesthan primatesFate ofShed asReabsorbedendometrium, ifconception doesnot occurmenstruation Females areAt any time ofOnly around thesexually aroused cycle unrelated totime of ovulationreceptivetime of ovulationi.e. estrous phaseor heat of cycle 