Metabolism of human embryos following cryopreservation: Implications for the safety and selection of embryos for transfer in clinical IVF

Abstract excerpt

BACKGROUND: Cryopreservation of supernumerary embryos is routinely performed in human-assisted reproduction, providing a source of embryos which can be thawed for use in subsequent treatment cycles. However, the viability of cryopreserved embryos has traditionally relied on morphological assessment, which is a poor predictor of embryo health since freezing leads to a significant overall reduction in implantation...

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