P –157 The pregnancy potential of embryos cryopreserved and thawed twice: A case-control study

This study was retrospective, and the small sample size limits interpretation of the results. FET has been demonstrated to increase the risk for fetal macrosomia and gestational hypertension/pre-eclampsia. Whether repeated cryopreservation enhances these effects or influences neonatal health in the long term needs further investigation.Wider implications of the findings: Acceptable LBR and neonatal outcomes may be expected after transfer of twice-cryopreserved embryos. Also, the survival rate is high. To avoid embryo wastage or transfer of multiple embryos, good quality surplus embryos from FET cycles may be considered for repeated cryopreservation by vitrification.Trial registration numberNot applicable
Source: Human Reproduction - Category: Reproduction Medicine Source Type: research