estrous cycle
Noun
Meaning
estrous cycle (plural estrous cycles)
(physiology) The repeating physiological changes that are influenced by hormones controlling reproduction in placental mammals other than human beings and greater apes.
Examples
Effects on the reproductive system during the estrous cycle Changes in hormone levels can have great effects on the physical characteristics of the reproductive organs of the mare, thereby preparing, or preventing, her from conceiving.
Hormones involved in the estrous cycle, during foaling, and after birth The cycle is controlled by several hormones which regulate the estrous cycle, the mare's behavior, and the reproductive system of the mare.
The estrous cycle (also spelled oestrous) controls when a mare is sexually receptive toward a stallion, and helps to physically prepare the mare for conception.
The estrous cycle lasts 30–33 days, with outward ovulation signs subtle compared to those of chimpanzees.
The estrous cycle of a mare occurs roughly every 19–22 days and occurs from early spring into autumn.
Vaginal smears are useful in timed matings to determine the stage of the estrous cycle.