Controversy exists as to whether the serum concentration of progesterone on the day of
human chorionic gonadotrophin (HCG) administration following ovarian stimulation for in …

Background Maternal serum human chorionic gonadotropin (hCG) is produced in
trophoblast cells during pregnancy. Whether there are sex-related growth differences of hCG …

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 …

Introduction: It has recently been shown that late follicular phase progesterone levels
correlate well with those in the early luteal phase, and that progesterone levels before and …

Research question Are maternal concentrations of human chorionic gonadotropin (HCG) on
a fixed day after embryo transfer associated with duration of pregnancy? Design A follow-up …

OBJECTIVE: Recombinant Human Chorionic Gonadotropins (rHCG) are commonly used for
triggering ovulation during IVF cycles. We reviewed the outcomes of long lupron …

Objective This study was conducted to compare the efficacy of subcutaneous recombinant-
human chorionic gonadotrophin (r-hCG) to intramuscular human urinary hCG (u-hCG) for …

Objective To define the time interval from intravenous and intramuscular hCG administration
to follicular wall rupture and the endocrinologic events associated with ovulation. Design …

The aim of this study was to determine the prognostic value of single and paired
measurements of serum concentrations of human chorionic gonadotrophin (HCG) for …

OBJECTIVE: To determine threshold β-hCG levels predictive of an ongoing pregnancy (OP),
live birth (LB), and multiple gestation (MG) in IVF cycles resulting from day-3 (D3) vs. day-5 …