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This prospective and randomised experiment was designed to compare the luteotrophic effect of whole versus half embryos and, to evaluate the relationship between the plasma progesterone (P4) profiles and the rates of early embryonic (from Days 7 to 25), late embryonic (Days 25–42) and foetal (Days 42–63) mortalities of whole and half embryo recipients. Within a single herd, 188 virgin, healthy, cyclic,...
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