Background: The objective was to compare the use of micronized vaginal progesterone 800 mg daily and oral dydrogesterone 40 in endometrial preparation for frozen-thawed embryo transfer (FET). Methods: Prospective randomized study with women undergoing FET along hormone replacement therapy preparation, between September 2019 February 2021. A total 73 patients were randomly selected orally receiv...

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...

Abstract Background Obstetrical outcomes in assisted reproduction techniques (ART) were compared with naturally conceived pregnancies and among each other multiple reports. However, many important changes the practice of vitro fertilization (IVF) over years, including single embryo transfers (sET) introduction modified natural IVF (mnIVF), advances frozen transfer (FET) might have impacted outc...

OBJECTIVE To compare the effectiveness of elective single embryo transfer versus double embryo transfer on the outcomes of live birth, multiple live birth, miscarriage, preterm birth, term singleton birth, and low birth weight after fresh embryo transfer, and on the outcomes of cumulative live birth and multiple live birth after fresh and frozen embryo transfers. DESIGN One stage meta-analysi...

Progestin-primed ovarian stimulation (PPOS) protocol has recently been demonstrated to be an novel regimen for preventing premature LH surges during controlled ovarian hyperstimulation (COH) in combination with frozen-thawed embryo transfer (FET). Our prospective controlled study was to explore the effect of human chorionic gonadotropin (hCG) contained in human menopausal gonadotropin (hMG) on ...

BACKGROUND A good blood supply to the endometrium is usually considered as an essential requirement for implantation. OBJECTIVE The aim of this study was to evaluate the role of endometrial and subendometrial vascularity in the prediction of pregnancy during frozen-thawed embryo transfer (FET) cycles. METHODS Women undergoing FET in natural or clomiphene-induced cycles after the first stimu...

STUDY QUESTION Are there differences in estrogen and progesterone secretion in singleton pregnancies, up to Week 11, between spontaneous pregnancies, after controlled ovarian hyperstimulation and fresh embryo transfer (COH + ET) and after frozen embryo transfer in a spontaneous cycle (FET)? SUMMARY ANSWER Serum progesterone and estradiol (E2) concentrations after COH + ET were higher in early...

Abstract Study question What are the neonatal outcomes of fresh/frozen-thawed embryos derived from monopronuclear zygotes (1PN)? Is there any influence method fertilization? Summary answer A total 231 monoembryonic transfers (TF) fresh or frozen/thawed 1PN allows to birth twenty-seven healthy babies. is known already Zygotes were classified 16 18 hours post insemination according extrusion seco...

STUDY QUESTION Does the type of luteal support affect pregnancy outcomes in recipients of vitrified blastocysts? SUMMARY ANSWER Luteal support with vaginal progesterone gel or i.m. progesterone (IMP) results in comparable implantation and pregnancy rates in IVF patients receiving vitrified blastocysts. WHAT IS KNOWN ALREADY In fresh IVF cycles, both IMP and vaginal progesterone have become ...

BACKGROUND Embryo culture media used for IVF treatment might affect fetal growth and thus birthweight of the newborns. METHODS A retrospective study was conducted in South China using data from 2370 singleton neonates born after IVF/ICSI between 2009 and 2012. Two culture media, i.e., either Vitrolife or SAGE were used as embryo culture media during the study period. Neonates' birthweights we...