Inseminations at Estrus Induced by Presynchronization Before Application of Synchronized Estrus and Ovulation
نویسندگان
چکیده
منابع مشابه
Fertility of Natural Vs Synchronized Estrus
Synchronizing estrus is an effective way to maximize the use of time and labor required to detect standing estrus in cattle. However, estrous synchronization can also benefit overall herd management. Cows that are synchronized 1) exhibit standing estrus at a predicted time, 2) conceive earlier in the breeding season, 3) calve earlier in the calving season, and 4) wean calves that are older and ...
متن کاملEffect of boar presence before and after weaning on estrus and ovulation in sows.
Two hundred sixty-two sows were used to investigate the effects of boar exposure during the last week of nursing (BPRE) and after weaning (BPOST) on the return to estrus. Because approximately one-half of the sows were weaning their first litter, a third factor, primiparous vs multiparous (LITT), was considered in the statistical analysis. To evaluate the effect of treatment on ovarian activity...
متن کاملControl of estrus and ovulation in beef cows2
Estrus synchronization and artificial insemination (AI) remain the most important and widely applicable reproductive biotechnologies available for cattle (Seidel, 1995). Although hormonal treatment of heifers and cows to group estrous cycles has been a commercial reality now for over 30 years, beef producers until now have been slow to adopt this management practice. Perhaps this is because of ...
متن کاملControl of estrus and ovulation in beef heifers.
Expanded use of artificial insemination (AI) and/or adoption of emerging reproductive technologies for beef heifers and cows require precise methods of estrous-cycle control. New protocols for inducing and synchronizing a fertile estrus in replacement beef heifers and postpartum beef cows in which progestins are used provide new opportunities for beef producers to synchronize estrus and ovulati...
متن کاملArtificial Control of Estrus and Ovulation in Female Yaks
Introduction Yaks are seasonal breeders and the breeding season lasts from July to October. If the females do not show obvious estrus in a particular breeding season, they will express estrus in the next breeding season or in some cases not until several breeding season later. The observed estrus rate of yaks is rather low, and the postpartum period is long. Most females deliver calves once eve...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2005
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(05)72700-4