There is still a clear difference between ova obtained from in vivo maturation and oocytes
matured in culture. Eggs obtained following the LH surge in vivo show a higher potential for
development. These observations indicate that cytoplasmic competence must be different
between the in vitro and the in vivo matured oocytes. Besides these functional differences, a
few studies have revealed additional discrepancies between in vitro and in vivo maturation
at the ultrastructure level. Differences in terms of subsequent anomalies were also observed …