BACKGROUND There is no consensus on the exact parameters that define the LH surge for natural cycle frozen-thawed embryo transfers (NC-FET). Accurately determining the LH surge would affect the timing, and subsequently the success rates, of embryo transfer. Therefore, the aim of this study was to delineate the optimal levels and relationship for luteinizing hormone (LH) and estradiol in an effo...

OBJECTIVE To evaluate whether endometrial or ovarian parameters as measured using 3D power Doppler ultrasound would predict the outcome in frozen embryo transfer (FET) cycles. METHODS Thirty women with no known gynecological pathology undergoing FET were recruited. The FET was carried out in the natural menstrual cycle 3-4 days after the first positive LH test result. Blood samples for hormon...

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...

Abstract Study question What are the factors affecting rates of live birth in frozen-thawed euploid embryo transfer cycles? Summary answer Some demographic characteristics, frozen (FET) cycle parameters, and characteristics patients affect cycles. is known already The aim assisted reproductive techniques (ART) to achieve as soon possible. Preimplantation genetic testing (PGT) an selection techn...

Objective: To investigate the correlation of blood flow detected by 2-Dimensional Power Doppler (2D-PD) sonography in the subendometrial-endometrial unit with the pregnancy outcome in frozen-thawed embryo transfer (FET) cycles. Study design: Prospective non-randomized observational study. Materials and methods: A total of 127 patients undergoing their first FET cycle were recruited and prepared...

Abstract Background Sufficient endometrial preparation with or without progesterone supplementation is crucial in artificial cycles frozen embryo transfer (FET). We aimed to study the effect of intramuscular on day (ET) cycles. Methods A clinical cohort involved women undergoing FET artificially prepared endometrium. Serum levels were assessed ET. Accordingly, we recruited 177 more than 9.2 ng/...

OBJECTIVE This study was designed to report the status of assisted reproductive technology (ART) therapy in South Korea between January 1, 2012 and December 31, 2012. METHODS A localized online survey, originally developed by the International Committee Monitoring Assisted Reproductive Technologies, was first launched and provided to all available ART centers via email in 2015. Fresh embryo t...

Abstract Study question Do serum progesterone or LH levels better predict the optimal timing for embryo transfer in true natural cycle frozen-thawed transfers (NC-FET)? Summary answer Performing according to (PL) had similar ongoing pregnancy rates compared levels. What is known already With efficient and safe vitrification techniques, there an increasing trend cycles (FET) over fresh cycles. F...

To evaluate the relationship between endometrial thickness during fresh in vitro fertilization (IVF) cycles and the clinical outcomes of subsequent frozen embryo transfer (FET) cycles.FET cycles using at least one morphological good-quality blastocyst conducted between 2012 and 2013 at a university-based reproductive center were reviewed retrospectively. Endometrial ultrasonographic characteris...