Methods and compositions for monitoring and enhancing early embryo development

摘要

Method for determining developmental fate of early embryos comprises measuring the expression level of a gene selected from the group consisting of CDKN1C, IGF2R, MAGEL2, MKRN3, NAP1L5, NDN, PEG3, PHLDA2, TSSC4, and UBE3A genes. Also disclosed is a method for improving pregnancy rate, wherein early embryos whose expression level of the MKRN3, NDN, PEG3, PHLDA2, TSSC4, or UBE3A gene is not increased, or the expression level of the CDKN1C, IGF2R, MAGEL2, or NAP1L5 gene is not decreased, are selected for planting into a suitable uterus for further development. Also disclosed are methods for increasing the likelihood of an early embryo to develop successfully into full-term pregnancy, wherein a suitable amount of siRNA corresponding to the PHLDA2 gene is injected into a fertilized egg which is in turn cultured further and planted into a suitable uterus.