The estrous cycle (from Latin oestrus 'frenzy', originally from Ancient Greek οἶστρος (oîstros) 'gadfly') is a set of recurring physiological changes...

old, at which age female dogs will start having an estrous cycle. There are four stages of estrous: proestrus, estrus, diestrus, and anestrus. A dog in...

menstrual cycle. Female domestic animals used for breeding—for example dogs, pigs, cattle, or horses—are monitored for physical signs of an estrous cycle period...

The cycle is controlled by several hormones which regulate the estrous cycle, the mare's behavior, and the reproductive system of the mare. The cycle begins...

continue to undergo regular estrous cycles until death unless the cycle is interrupted by a pregnancy. In cows, a complete estrous cycle lasts 21 days. Most commonly...

or proliferative phase, is the phase of the estrous cycle (or, in primates for example, the menstrual cycle) during which follicles in the ovary mature...

estrous cycle and it shortens estrous cycles. The second signal is released during the ovulatory phase of the estrous cycle and it lengthens estrous cycles...

mouse. In most other mammals, the endometrium is reabsorbed in the estrous cycle. During pregnancy, the glands and blood vessels in the endometrium further...

veterinary medicine, it helps differentiate the stages of the mammalian estrous cycle because the vaginal epithelium changes in response to sex hormone levels;...

mature. Female dogs have an estrous cycle that is nonseasonal and monestrus, i.e. there is only one estrus per estrous cycle. The interval between one estrus...

dynamics is essential. If a female hamster encounters a male when her estrous cycle is not at the point for mating, then the two hamsters will be aggressive...

through the vagina (in mammals that go through a menstrual cycle). Across an estrous cycle, the functional layer regenerates to provide nourishing tissue...

and hormonal intrauterine devices (IUDs). Most female mammals have an estrous cycle, but only ten primate species, four bat species, the elephant shrews...

artificial insemination. The term “estrus” refers to the phase of the estrous cycle in which a sexually mature, non-pregnant female is receptive to sexual...

subsequent estrous cycles semiannually, during which the body prepares for pregnancy. At the peak of the cycle, females will become estrous, mentally and...

overlooked because males have fewer "complicating" factors such as the estrous cycle. The book won Foyles Non-Fiction Book of the Year in December 2023....

sexual maturity and undergoes estrous cycles (proestrus, estrus, metestrus, and diestrus). As a result of estrous cycling, the mammary gland undergoes...

infertility, either primary anestrus or infertility with an otherwise normal estrous cycle. Canine trisomy X is thought to be underascertained, as most pet dogs...

first ovulatory cycle occurs when she is six years of age, and is followed by a two-year period of adolescent infertility. The estrous cycle lasts 30–33 days...

Wildebeest females breed seasonally and ovulate spontaneously. The estrous cycle is about 23 days and the gestation period lasts 250 to 260 days. The...

decrease the firing rate and burst frequency of GnRH neurons in a sex- and estrous cycle-dependent manner.This inhibitory effect is mediated through the growth...

sources write that queen refers solely to unspayed cats that are in an estrous cycle. (or sometimes a molly, if spayed). A juvenile cat is referred to as...

an estrous cycle. This cycle is regulated by surges in Luteinizing hormone that are observed three weeks from each other. This type of estrous cycle has...

was analyzed through immunoassay to know about their luteal phase. Estrous cycle duration was of about 33 days. During pregnancy, ultrasonography showed...

deuterostome developmental biology diakinesis dioestrus In the mammalian estrous cycle, the long period of quiescence following ovulation, during which the...

dictionary. The mating season is the seasonal period when a female animal's estrous cycle is active, signaling animals to mate The Mating Season or variation...

power In heat or on heat, a period of increased sexual drive in the estrous cycle of mammals Heat pump Hīt, Iraq (pronounced "heat") Renewable heat The...

of the risk, those spayed after one estrous cycle have 8.0% of the risk, and dogs spayed after two estrous cycles have 26.0% of the risk of developing...

other animals. They mature between 8–10 weeks of age and have a 4-day estrous cycle. Female Syrian hamsters show mate preference before they engage in copulation...

responsible for controlling gestation, birth, and lactation, as well as her estrous cycle and mating behavior. The stallion's reproductive system is responsible...