Objectives: To determine the prognostic value of beta human chorionic gonadotropin (ß-
hCG) concentration on the sixteenth day after embryo transfer to predict pregnancy outcome …

Introduction Repeated implantation failure (RIF) frustrates both patients and their clinicians.
Our aim was to observe the effects of intrauterine administration of human chorionic …

Objective In typical viable natural conceptions, trophoblast invasion is well underway 10-11
days after ovulation, and delayed implantation evidenced by delayed elevation in human …

Objective: To assess the predictive value for clinical pregnancy outcome of β-hCG level at
13 d after embryo transfer. Methods: Retrospective study of IVF clinical pregnancies …

Objective To compare the efficacy of human chorionic gonadotrophin (hCG) at reduced
doses of 2 000 IU and 3 000 IU for moderate or high responders with the dose of 5 000 IU in …

OBJECTIVE: Low initial serum βhCG is a good predictor of early pregnancy failure. We
sought to determine the contribution of treatment variables and the predictive value of early …

OBJECTIVE: To compare frozen-thawed embryo transfer (FET) outcomes in natural cycles
according to ovulation induction: spontaneous versus recombinant human chorionic …

Objective To assess perinatal outcomes and placental findings after in vitro fertilization (IVF)
with an initial low serum β-human chorionic gonadotropin (hCG). Design A retrospective …

Objective To compare serum hCG levels after transfer of a single fresh cleavage embryo and
of a single fresh blastocyst embryo and to determine the predictive value of serum hCG …

Objective It is difficult to predict whether an IVF cycle resulting in implantation will eventually
lead to a term pregnancy. Physicians commonly obtain a β-hCG level 14 days after embryo …