Interests of Pregnancy Follow-Up in Cows after Embryo Transfer_Special Focusing on IVP and NT

In this work, pregnancies were obtained after extreme in vitro conditions, (i) IVM/F/C of the donor embryos, (ii) IVM, enucleation and artificial activation of the recipient oocytes, (iii) nuclear transfer and (iiii) IVC of the reconstituted embryos. Cumulative information recorded, - in vitro and in vivo embryonic mortality, - bPAG concentrations follow-up, - placental, - umbilical cord and newborn examinations, showed that most alterations are mainly localized in the trophoblastic compartment. This complex syndrome observed, associating large calf, trophoblastic hypertrophy and abnormal profiles of bPAG is probably originated from uncomplete oocyte competence associated to very long in vitro culture.BE; en; secretariaat.scicom@favv-afsca.b