OBJECTIVE To investigate whether serum levels of estradiol affect reproductive outcomes of normoresponder women undergoing fresh embryo transfer (ET) versus frozen-thawed ET (FET). MATERIAL AND METHODS Two hundred fifty-five normoresponder women underwent fresh ET in their first or second in vitro fertilization cycle. Ninety-two women with negative pregnacy test results underwent FET. Clinica...

BACKGROUND Advances in embryo culture technology and cryopreservation have led to a shift in in vitro fertilization (IVF) from early fresh or frozen-thawed cleavage embryo transfer to fresh or frozen-thawed blastocyst stage transfer. OBJECTIVE To compare the clinical outcomes of fresh embryo transfers and frozen-thawed embryo transfers. MATERIALS AND METHODS In this retrospective case contr...

Abstract Background There remains a lack of evidence to demonstrate whether the initiation time estrogen stimulation is flexible in proliferative endometrial phase during artificial cycle for frozen-thawed embryo transfer (AC-FET). Methods FET records were retrospectively reviewed from large university-affiliated reproductive medicine center. Only patients who undergoing their first with single...

background: implantation failure is one of the most important factors limiting success in ivf treatment. the majority of trials have demonstrated favorable effect of endometrial injury on implantation success rate especially in women with recurrent implantation failure, while some studies failed to detect any benefit. objective: the purpose of our trial was to explore whether endometrial injury...

BACKGROUND Fresh embryo transfer results in higher live birth rates, while thawed embryo transfer appears to result in healthier babies. This study aims to investigate the association between the transfer of fresh or thawed embryos at the cleavage or blastocyst stage and the perinatal outcomes. METHODS This analysis is a retrospective population-based study of 150 376 autologous embryo transf...

BACKGROUND Implantation failure is one of the most important factors limiting success in IVF treatment. The majority of trials have demonstrated favorable effect of endometrial injury on implantation success rate especially in women with recurrent implantation failure, while some studies failed to detect any benefit. OBJECTIVE The purpose of our trial was to explore whether endometrial injury...

OBJECTIVES To determine whether there is a difference in outcome between different ovulation-induced cycles after frozen-thawed embryo transfer (FET). METHODS We searched the Cochrane Menstrual Disorders and Subfertility Group's trials register in May 2009, the Cochrane Central Register of Controlled Trials (Cochrane Library, Issue 1, 2008), ISI Web of Knowledge (1985 to August 2009), and ref...

Purpose The aim of the present prospective study was to investigate the efficacy of hyaluronan (HA) using two different concentrations as embryo transfer media for in vitro fertilization embryo transfer cycles. Methods A total of 169 cycles undergoing fresh embryo transfer on day 2 or 3, 561 cycles undergoing frozen-thawed embryo transfer on day 2 or 3, and 484 cycles of frozen-thawed blastoc...

BACKGROUND The purpose of this study was to determine the optimal endometrial preparation protocol by comparing the clinical outcome of two methods of endometrial preparation in frozen-thawed embryo transfer (FET) cycles, including that is, oral estradiol and 17ß-estradiol transdermal patch. METHODS In this randomized controlled trial, women underwent either conventional IVF or intracytoplasm...

Abstract Background Underweight and overweight may affect reproduction interfere with treatment of infertility. In the present retrospective analysis, we sought to evaluate effect low body mass index (BMI) on pregnancy perinatal outcomes in frozen–thawed embryo transfer (FET) cycles. Methods This study involved 8755 FET cycles a single IVF center during period from January 2009 December 2018. B...