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A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. [34] Precocial mammal species generally have greater adult body weights than altricial mammals as precocial mammals have markedly longer gestation periods than altricial mammals. [35]
Horse breeding is reproduction in horses, and particularly the human-directed process of selective breeding of animals, particularly purebred horses of a given breed. Planned matings can be used to produce specifically desired characteristics in domesticated horses. Furthermore, modern breeding management and technologies can increase the rate ...
The duration of this period varies between species. For most species, the amount a fetus grows before birth determines the length of the gestation period. Smaller species normally have a shorter gestation period than larger animals. [2] For example, a cat's gestation normally takes 58–65 days while an elephant's takes nearly 2 years (21 ...
Female cattle, also referred to as "heifers" in agriculture, will gradually enter standing estrus, or "standing heat," starting at puberty between 9 and 15 months of age. The cow estrous cycle typically lasts 21 days. [5] Standing estrus is a visual cue which signifies sexual receptivity for mounting by male cattle.
[14]: 577 Herd bulls do not have time to feed during the rut due to constantly fighting other bulls as well as chasing and breeding cows. [13] Occasionally a third breeding phase will occur. This will usually take place around the end of October or early November. This is a result of yearling cows coming into estrus for the first time or two ...
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Hippomanes first appears in pregnant horses and zebras ca. 85 days from conception, earlier there being small white flecks of tissue debris instead. [1] The changes in hippomanes color correspond to changes in color of allantoic fluid. [1] They are often surrounded by shed cells.
This cow is known to produce good beef in poor conditions but needs care to protect it from becoming overweight. It was the quality of Irish Moiled beef that had saved the breed from extinction. [7] The Irish Moiled cow has a gestation period of about nine months if kept at a decent health.