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...

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...

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;...

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...

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....

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

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...

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...

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

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

though mares in the wild may allow a foal to nurse for up to a year. The estrous cycle, also known as "season" or "heat" of a mare occurs roughly every 19–22...

favorable for wild animal or bird breeding Estrus, a period in the estrous cycle of mammals when female seasonal breeders are receptive to mating Christmas...

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

tb05821.x. PMID 853730. Johnson, A.K; Kutzler, M.A, eds. (2022). "Feline Estrous Cycle". Feline Reproduction. pp. 11–22. doi:10.1079/9781789247107.0002. ISBN 9781789247084...

hormones during periods such as pregnancy, lactation, and following the estrous cycle. This is particularly visible in pyramidal cells of the CA1 region of...

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

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

babirusa reach sexual maturity when they are 5–10 months old. Their estrous cycle is 28–42 days, and the gestation period lasts 150–157 days. The females...

and a divided uterus; many have a marsupium, the pouch. The average estrous cycle of the Virginia opossum is about 28 days. Opossums do possess a placenta...

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

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...

marsupial has a short gestation period, typically shorter than its estrous cycle, and gives birth to an underdeveloped (altricial) newborn that then...

maturation is 30.4 months for females and 27.7 months for males. The estrous cycle of the binturong lasts 18 to 187 days, with an average of 82.5 days...

does not occur, the secretory lining will be absorbed (estrous cycle) or shed (menstrual cycle). The decidua is shed with the placenta during birth. As...