4.1. Conclusions
Embryos were produced in vitro using X-sorted sperm
without loss in competence to establish and maintain
pregnancy after transfer into recipients, compared with
embryos produced with nonsorted sperm. However, pregnancy
losses tended to be higher for cows receiving
embryos produced in vitro than for cows bred by TAI.
Therefore, this emphasized the importance of optimizing
culture systems to allowembryonic development in vitro to
more closely match events occurring in vivo.