Maternal β-HCG concentrations in early IVF pregnancy: association with the embryo development stage of blastocysts

ConclusionsFaster-growing blastocysts produced significantly higher serum β-HCG concentrations 9 days after transfer than slower-growing blastocysts in fresh cycles, but the difference was not significant by day 16 after transfer. Also, β-HCG concentrations 9 and 16 days after embryo transfer in FET cycles were higher than in fresh embryo transfer cycles. Interpretation of β-HCG results 9 days after blastocyst transfer should consider the blastocyst growth rate and whether fresh or cryopreserved embryo was transferred.
Source: Reproductive BioMedicine Online - Category: Reproduction Medicine Source Type: research