Thereafter, embryos were
transferred at the blastocyst stage to crossbred recipient heifers. The pregnancy rates after
transfer were: 29.4% (15/51) for non-stressed Nelore embryos, 29.0% (11/38) for stressed
Nelore embryos, 21.4% (6/28) for non-stressed Angus embryos and 7.1% (1/14) for
stressed Angus embryos.