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The use of CIDRs with synchronization protocols helps improve reproductive performance by reducing the inefficiency associated with estrus detection. [ 6 ] Although there is variability in the response to estrus synchronization, studies show consistently high pregnancy rates following Fixed Time Artificial Insemination with CIDR synchronization ...
Much estrous control in cattle is for the purpose of synchronization, a practice or set of practices most often used by cattle farmers to control the timing and duration of estrus in large herds. [4] There is variation between the available methods of cattle estrous synchronization.
The term “estrus” refers to the phase of the estrous cycle in which a sexually mature, non-pregnant female is receptive to sexual advances from the male³. Ovulation occurs at approximately this time. [1] Estrous synchronisation is the process of targeting female mammals to come to heat within a short time frame (36 to 96 hours).
The commandment is preceded by the instruction that a calf or lamb is only acceptable for sacrifice on the eighth day (22:26). [1] The Hebrew Bible uses the generic word for bull or cow (Hebrew: שור showr [2]), and the generic word for sheep and ewe (שה seh) and the masculine pronoun form in the verb "slaughter-him" (Hebrew shachat-u)
The shepherd usually leads the flock, calling the sheep by their names from time to time; in his footsteps follows an old he-goat, whose stately bearing affords to the natives matter for several comparisons; the Arabs, indeed to this day, call a man of stately mien a "he-goat". The shepherd at sunset waters his flock, folds them ordinarily in ...
A herd bull will also bugle while approaching a cow in estrus so the cows become familiar with his bugles. [13] The first rest phase of the rut occurs between the middle and the end of September. At this time the older cows are predominantly out of estrus and the younger cows have not yet come into estrus.
The Lee–Boot effect is a phenomenon concerning the suppression or prolongation of oestrous cycles of mature female mice (and other rodents), when females are housed in groups and isolated from males.
Female seasonal breeders will have one or more estrus cycles only when she is "in season" or fertile and receptive to mating. At other times of the year, they will be anestrus, or have a dearth of their sexual cycle. Unlike reproductive cyclicity, seasonality is described in both males and females.