Background: Despite recent technical improvement in assisted reproductive techniques (ART), the implantation rate per embryo still remains low (15%). The aim of the study is to determine whether the failure of IVF cycle is associated with endometrial thickness on the day of HCG (human chorionic gonadotropin) administration. Materials and Methods: Endometrial thickness of two hundred and seven p...

Culture of bovine embryos in the presence of insulin-like growth factor-1 (IGF-1) can increase pregnancy rates following transfer to heat-stressed, lactating dairy cows. The objective of the present experiment was to determine whether the effect of IGF-1 on post-transfer embryo survival was a general effect or one specific to heat stress. Lactating recipients (n=311) were synchronized for timed...

BACKGROUND Human chorionic gonadotropin (HCG), one of the initial embryonic signals, is probably a major regulator of the embryo-endometrial relationship. This study aims to assess the advantage of HCG supplementation during the secretory phase of hormonally prepared cycles for the transfer of cryopreserved-thawed embryos. MATERIALS AND METHODS This study was a randomized clinical trial. Infe...

BACKGROUND We aimed to assess the validity of a theoretical mathematical model to predict the pregnancy rate and the multiple pregnancy rate in IVF/oocyte donation programmes on the basis of the implantation rate and the number of transferred embryos. METHODS A total of 1835 embryo transfers corresponding to three different programmes in two centres with different implantation rates were anal...

background: repeated implantation failure (rif) is a major challenge in reproductive medicine and despite several methods that have been described for management, there is little consensus on the most effective one. objective: this study was conducted to evaluate the effectiveness of platelet-rich plasma in improvement of pregnancy rate in rif patients. materials and methods: twenty women with ...

background: implantation failure is the most important cause of recurrent in vitro fertilization/intra cytoplasmic sperm injection (ivf/icsi) failure. several reports suggest that intercourse during the peritransfer period might improve pregnancy rates. this study is designed to determine whether intercourse during the peritransfer period will improve pregnancy and implantation rates in patient...

High implantation success following in vitro fertilization cycles are achieved via the transfer of embryos with the highest developmental competence. Multiple pregnancies as a result of the transfer of several embryos per cycle accompany with various complication. Thus, single-embryo transfer (SET) is the preferred practice in assisted reproductive technique (ART) treatment. In order to improve...

Embryo cryopreservation is a vital part of any assisted conception programme. We analysed our experience with respect to various clinical factors which may influence success and help modify our own practice. Factors studied were endometrial preparation, number of embryos transferred, woman's age at embryo freezing and endometrial thickness. The 212 cycles analysed represented all our frozen emb...

BACKGROUND/AIMS Catheter injection speed affects depth and placement of the embryo into the uterine cavity and is shown to be highly variable in, and between, subjects in a manually performed embryo transfer. In an effort to standardize the injection speed during embryo transfer, we developed an automated transfer pump: the pump-regulated embryo transfer (PRET) device. In this randomized contro...

A systematic review of the literature was conducted which examined each of the major steps of embryo transfer. Recommendations made for improving pregnancy rates are based on interventions demonstrated to be either beneficial or not beneficial.