Collection, description and transfer of embryos from cattle 10-16 days after oestrus
نویسندگان
چکیده
منابع مشابه
Use of embryo transfer seven days after artificial insemination or transferring identical demi-embryos to increase twinning in beef cattle.
Our objectives were to determine pregnancy rate, fetal loss, and number of calves born in beef cattle after a fixed-time transfer of an embryo 7 d after a fixed-time artificial insemination (TAI) of cows (Exp. 1) and after transfer of 2 demi-embryos into a single heifer recipient (Exp. 2). In Exp. 1 after synchronization of ovulation, during 2 yr, 297 suckled beef cows were assigned randomly to...
متن کاملdelayed transfer of embryos from 2 to 3 or 4 days after oocyte retrieval and the pregnancy rate in icsi
background: embryo transfer (et) has traditionally been performed two days after oocyte retrieval. delaying transfer from day two to day three or four would allow for further development of the embryo might therefore optimize the selection of viable and best quality embryos for transfer and may be closer to the physiological time of the entry into the uterus than transfer on day two and might h...
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Two experiments were conducted to determine the viability of porcine embryos transferred after long-term in vitro culture. In Exp. 1, four-cell embryos were kept in culture for 120 h. Embryos that were exposed to fresh culture medium every 12 h survived better than embryos kept in the same medium throughout the culture period. In Exp. 2, four- and eight-cell embryos were cultured in vitro for 7...
متن کاملExpression and detection of oestrus in cattle.
For herds using AI heat detection rate and calving rate are the two major determinants of compactness of calving, of the proportion of cows that fail to conceive in a defined breeding season. Numerous factors affect the expression of heat including, housing arrangement, floor surface, feet and leg problems and status of herd mates. The number of mounts a cow receives increases with the number o...
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An 84-year-old man with severe (GOLDIV) chronic obstructive pulmonary disease (COPD) and a history of pulmonary thromboembolism andwarfarin medicationwas admitted for elective endoscopic retrograde cholangiopancreatography (ERCP) for choledocholithiasis. He had stopped warfarin medication a week before (international normalized ratio [INR] 1.14), and was kept on low-molecular-weight heparin. ER...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1980
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0590205