Purpose The present study investigated the role of β-hCG in predicting reproductive
outcomes and established optimal β-hCG cutoff values in women undergoing cleavage …

The aim of this study is to compare the serum β-hCG values post transfer of a cleavage
stage embryo versus a blastocyst stage embryo at equal time intervals post oocyte retrieval …

Purpose The objective of this study is to identify the pregnancy outcomes based on day-16 β-
hCG level assessed with modern assays, in fresh single embryo transfers. Methods A …

Purpose Specific serum beta human chorionic gonadotropin (β-hCG) parameters that can
predict live birth after an embryo transfer have yet to be defined. Methods We performed a …

Serial human chorionic gonadotropin (hCG) β subunit measurements of 300 pregnancies
achieved by in vitro fertilization (IVF) were obtained by 15 IVF centers worldwide. Hormonal …

Objective. Analysis of serum β-human chorionic gonadotropin (β-hCG) levels on
standardized days after oocyte retrieval (OR) following single blastocyst transfer to predict …

Research question Does the blastocyst development stage on embryo transfer day affect
serum β-human chorionic gonadotrophin (β-HCG) concentration 9 and 16 days after embryo …

Purpose: Our purpose was to assess the predictive value for pregnancy outcome of an initial
serum quantitative β-hCG measurement obtained 11 or 12 days after embryo transfer in an …

Background Although preimplantation genetic test (PGT) has been used worldwide, few
studies investigated the effect of trophectoderm biopsy of blastocysts on early embryo …

Purpose The aim of the present study was to evaluate if the live birth predictive values of β-
hCG levels differ in fresh and vitrified-warmed blastocyst transfer cycles. Methods In the …