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Equine chorionic gonadotropin (acronym given as eCG but not to be confused with ECG) is a gonadotropic hormone produced in the chorion of pregnant mares.Previously referred to as pregnant mare's serum gonadotropin (PMSG), the hormone is commonly used in concert with progestogen to induce ovulation in livestock prior to artificial insemination.
Feeder cattle or store cattle are young cattle soon to be either backgrounded or sent to fattening, most especially those intended to be sold to someone else for finishing before butchering. In some regions, a distinction between stockers and feeders (by those names) is the distinction of backgrounding versus immediate sale to a finisher.
More developed infants will typically require a longer gestation period. Altricial mammals needs less time to gestate compare to the precocial (well-developed neonate) mammal. A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. [34]
A freemartin or free-martin (sometimes martin heifer) is an infertile cow with masculinized behavior and non-functioning ovaries. [1] Phenotypically, the animal appears female, but various aspects of female reproductive development are altered due to acquisition of anti-Müllerian hormone from the male twin . [ 2 ]
Freemartins, female bovines that are behaviorally masculine and lacking functioning ovaries, are commonly associated with cattle, but do occur to some extent in sheep. [6] The instance of freemartins in sheep may be increasing alongside the rise in twinning (freemartins are the result of male-female twin combinations).
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.
A spreadsheet developed by Kansas State University agricultural economist Kevin C. Dhuyvetter and beef specialist Dale Blasi to calculate the costs of a RFID-based animal identification system, published in July 2005, puts the costs at $7.21 per head for a herd of 250 cattle, based on variables including the cost of tags and hardware such as ...
Throughout most of human prehistory and history, the primary means of livestock transportation was by droving.The reason was usually either for seasonal grazing movement (to move them to a summer grazing range or to move them to an overwintering range or shelter) or to bring them to market of one form or another, whether bartering livestock (between farmers) or selling them (whether as stores ...