Background: Whether gonadotropin-releasing hormone agonist (GnRH-a) pituitary suppression improves clinical outcomes in non-endometriosis patients undergoing frozen embryo transfer remains controversial. The objective of this study is to investigate whether GnRHa combined with replacement treatment (HRT) compared HRT alone can improve the frozen-thawed without endometriosis. Methods: This a ret...

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 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...

To assess the association of zona pellucida micromanipulation and subsequent development of monozygotic twins, cases of assisted embryo hatching (AH) and intracytoplasmic sperm injection (ICSI) were identified and related to treatment type, implantation and zygosity data. Embryology records from all patients undergoing in-vitro fertilization (IVF) at this centre from January 1995 to March 1998 ...

OBJECTIVE Great advances have been made in the field of assisted reproductive technology (ART) since the first in vitro fertilization (IVF) baby was born in Korea. This study was designed to report on the current status of ART therapy in South Korea between January 1 and December 31 of 2010. METHODS A revised survey, originally developed by the International Committee Monitoring Assisted Repr...

Based on the fact that follicular phase of menstrual cycle is variable in length, it has been assumed duration estrogen (E2) priming could also be variable. A controversy emerged however between studies indicating an extended E2 only treatment alters ART outcomes and others challenged such effect. Therefore, we conducted our own analysis to further determine impact following single frozen blast...

During spring, summer and winter seasons, Sistani donor cows, with normal reproductive status, were superovulated and embryos were recovered non-surgically on day 7. Grade A blastocyst embryos were either transferred fresh (spring) or frozen (summer and winter). Recovered embryos during summer and winter were exposed to glycerol and frozen using conventional method. During spring season, recipi...