Laboratory production of cattle embryos by I Gordon, what can be done for the cow today will later be

By I Gordon, what can be done for the cow today will later be applicable to other farm livestock and

3000 new references additional because the first editionGives info essential to produce embryos completely via in vitro suggestions

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Dawn of cattle ET industry By the late 1960s, Rowson was able to report that acceptable pregnancy rates could be achieved in cattle using surgical approaches. This provided much of the stimulus to commercial concerns far and wide to develop ET technology. Across the Irish Sea, Sreenan and Beehan (1974) in Galway were among the first to confirm the effectiveness of Rowson’s procedures. Up until retirement in 1979, Rowson continued to make valuable contributions to ET knowledge and became rightly regarded as the father-figure in cattle ET technology.

2001c). As well as producing embryos for research or commercial use, the in vitro technology has relevance to assessing bull fertility (Rodriguez-Martinez and Larsson, 1999). Conventional assessment of sperm quality in AI bulls can now be aided by tests such as the induction of the acrosome reaction (AR), zona pellucida-binding assays and IVF. 6). In Europe, 14,079 embryos derived from live donor animals and 12,441 produced from abattoir ovaries were transferred. In recent years, IVP of cattle blastocysts has become a routine research tool in many laboratories; on the farm, it is being used increasingly to obtain embryos from infertile donors.

D A rough estimation of the numbers of ETs that were not officially recorded and hence not incorporated in the table above leads to about 11,500 more embryos transferred in Asia (Bangladesh, India, Pakistan), which leads to the total number of in vivo-derived embryos transferred in the year 2000 = 539,000, rounded up for official records to 540,000. b Developments in Embryo IVP Technology 24 h. Although more data are required, the practical implications of such work may lie in permitting embryos that were hitherto discarded to be frozen or used in transfers.

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