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To determine the chromosomal complement of pre-morula bovine embryos, 30 Holstein heifers were superovulated and inseminated and their embryos were subjected to chromosome analysis on days 2, 3 or 4. Of the 298 embryos/ova recovered, 101 had one or more cells in metaphase and of these, 60 could be karyotyped. Eight of the karyotyped embryos were(More)
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