The aim of this study was to analyze the incidence of stage of embryonic development, embryo quality and the time of transfer on pregnancy rate in embryo transfer program timed. We were worked a total of 23Holsteincowsasembryo donors, super-ovulated with gonadotropin of pregnant mare serum (PMSG) (2500 3000UI).69 cows were used as recipients of Holstein dairy heifers with an age of20 months and...

the society for assisted reproductive technology (sart) method of embryo grading is unique, simple, and widely practiced, and its use has been mandatory for sart membership programs since 2010. developed by sart in 2006, the current embryo grading system categories, “good, fair, and poor,” are limited because they do not describe the best 1-2 embryos in the interest of keeping pace with the shi...

It has been repeatedly demonstrated that estrous expression before fixed-time AI (TAI) results in increased pregnancy success. Therefore, the objective of this experiment was to determine if preblastocyst embryonic developmental characteristics differed from heifers that did or did not exhibit estrus before TAI. Beef heifers (n = 113) were synchronized using the 5-d CO-Synch + controlled intern...

Here we assess bisphenol A (BPA) in couples undergoing in vitro fertilization (IVF) and indicators of embryo quality; embryo cell number (ECN) and embryo fragmentation score (EFS). Twenty-seven couples provided serum on the day of oocyte retrieval. Unconjugated BPA was measured by HPLC with Coularray detection. Odds ratios (OR) were generated using ordinal logistic regression including female a...

background: oxidative stress (os) in the follicular environment may affect on oocyte competence and antioxidant vitamins may modify its effects. objective: this study was conducted to examine the effect of dietary intake of vitamin a, c and e on os in follicular environment and assisted reproduction technology (art) outcomes. materials and methods: in this obsevationalprospective study, the int...

the success rate of reproductive treatment methods depends on many different factors. the most important and discussed ones in the literature are maternal age, the causes of infertility, the ovarian response to stimulation, the influence of the male factor and sperm quality, embryo quality and the various uterine pathologies. some couples fail repeatedly after transferring good quality embryos ...

background: one determining factor of a successful ivf cycle is embryo quality. the aim of the present prospective study was to evaluate the associations between markers of ovarian reserve and ovarian response and embryo quality materials and methods: one hundred and twenty infertile women, aged 21-44 years, undergoing routine exploration during an unstimulated cycle that preceded art at our ce...