BACKGROUND A poor quality of oocytes and embryos and a low fertilization rate have been found in polycystic ovary syndrome (PCOS) patients. An inverse association between follicular fluid homocysteine (Hcy) levels and oocyte and embryo quality has also been demonstrated. We examined the relationship between follicular fluid Hcy concentrations and oocyte and embryo quality in PCOS patients under...

INTRODUCTION In women showing impaired fertility, a decreased response to ovarian stimulation is a major problem, limiting the number of oocytes to be used for assisted reproduction techniques (ART). Despite the several definitions of poor response, it is still a matter of debate whether young poor responder patients also show a decrease in oocyte quality. The objective in this study was to inv...

objective: sleep quality affects on physical and psychological well being and even academic functions of students. indeed, sleep quality has been suggested as an individual index of general health. among adolescents and young adults, poor sleep quality is common. the aim of this survey was to determine the sleep quality and its correlation with general health in 18-year-old iranian students. me...

Systems for the in vitro production (IVP) of porcine embryos have advanced to the stage where large numbers of embryos can be reliably generated from the oocytes of abattoir-sourced ovaries in a single production run. These systems are extremely useful for studying various aspects of porcine gamete and embryo biology, developing associated reproductive technologies, such as embryo cryopreservat...

Background Timing of the first zygotic cleavage is an accurate predictor of embryo quality. Embryos that cleaved early (EC) have been shown to exhibit higher developmental viability compared to those that cleaved at a later period (LC). However, the viability of EC embryos in comparison to LC embryos after vitrification is unknown. The present study aims to investigate the post-vitrification de...

OBJECTIVE The aim of this study was to evaluate pregnancy outcomes and the live birth rate at 1-year age increments in women aged ≥40 years undergoing fresh non-donor in vitro fertilization (IVF) and embryo transfer (ET), and to identify predictors of success in these patients. METHODS This retrospective study was performed among women ≥40 years of age between 2004 and 2011. Of the 2,362 cycl...

background: recently different studies suggested that discontinuation of gonadotrophin releasing hormone analogue (gnrha) at beginning of ovarian stimulation (improvement of ovarian response to gonadotrophins) may have some benefit to poor responder patients in invitro fertilization (ivf) cycles. objective:the efficacy of gnrha stop protocol in poor responder patients in ivf cycles was assessed...

Parthenogenesis is the process by which an oocyte develops into an embryo without being fertilized by a spermatozoon. Although such embryos lack the potential to develop to full term, they can be used to establish parthenogenetic embryonic stem (pES) cells for autologous cell therapy in females without needing to destroy normally competent embryos. Unfortunately, the capacity for further differ...

background: timing of the first zygotic cleavage is an accurate predictor of embryo quality. embryos that cleaved early (ec) have been shown to exhibit higher developmental viability compared to those that cleaved at a later period (lc). however, the viability of ec embryos in comparison to lc embryos after vitrification is unknown. the present study aims to investigate the post-vitrification d...