AIM To provide results of the use of estradiol pretreatment in a combination of an ultrashort gonadotropin-releasing hormone (GnRH) agonist and antagonist protocol, in an attempt to improve the clinical outcomes in "poor responders", according to the Bologna criteria, undergoing in vitro fertilization (IVF). PATIENTS AND METHODS We applied estradiol pretreatment to 20 participants before the ...

In an attempt to examine whether body mass index (BMI) may influence IVF outcome in patients undergoing COH with either GnRH-agonist (agonist group) or GnRH-antagonist (antagonist group), we studied 799 IVF cycles: 481 in the agonist group and 318 in the antagonist group. In patients with BMI >25 kg/m(2), COH with either GnRH-agonist or GnRH-antagonist achieved a comparable outcome; whereas in ...

BACKGROUND The differential efficacy between long GnRH agonist with antagonist can partly be due to the preexisting differences in the early antral follicles before ovarian stimulation. OBJECTIVE To compare the effect of pretreatment by estradiol with GnRH antagonist on antral follicular size coordination and basal hormone levels in GNRH antagonist protocol. MATERIALS AND METHODS On cycle d...

Abstract Study question Micronized progesterone or GnRH antagonist: which is better to control the LH surge in egg donation process? Summary answer better. Is just as effective antagonist and offers three additional advantages: cheaper, more convenient, saves intermediate controls. What known already antagonists have been widely considered prevent surge. When fresh embryo transfer not advised, ...

To explore the effect of different ovulation induction regimens on pregnancy outcome patients with endometriosis and infertility treated in vitro fertilization transplantation. From December 2016 to 2019, a total 324 were selected as subjects. After same treatment, three protocols (super long protocol, modified protocol antagonist protocol) studied retrospectively. Baseline, Gonadotropin dosage...

BACKGROUND Determination of oocyte fertilization and embryo quality are one of the most important purposes in ART cycles. Follicular fluid provides an important microenvironment for development of oocytes and some biochemical characteristics of the follicular fluid, such as pregnancy-associated plasma protein-A (PAPP-A), may play an important role in prediction of success rate of ART. OBJECTI...