cumulative embryo score (ces) is one of the many embryo scoring methods which have been developed to help clinicians to transfer high quality embryos and predict pregnancy rate in assisted reproductive techniques (art) cycles. regarding the existing difference in ces calculation this study was done to compare two methods in order to determine the more practical and preferable one. in a retrospe...

The low efficiency of somatic cell nuclear transfer may be related to the ultrastructural deviations of reconstructed embryos. The present study investigated ultrastructural differences between in vivo-produced and cloned goat embryos, including intra- and interspecies embryos. Goat ear fibroblast cells were used as donors, while the enucleated bovine and goat oocytes matured in vitro as recipi...

Background According to the global increasing trend of infertility, using assisted reproductive technologies to solve this issue is recommended. It seems that vitamin E is an antioxidant with protective role in the body. Therefore, we aimed to investigate the relation between levels of vitamin E in Follicular fluid with the morphology of oocytes and the quality of embryos in patients with IVF. ...

Introduction: In the present research, the effect of morphine consumption during pregnancy on the development of the embryo’s spinal cord was studied in Wistar rat. Methods: Female Wistar rats (Wt: 250-300 g) were mated with males. The test group received morphine (0.01 mg/ml) in their drinking water. Pregnant rats were later killed with chloroform on the 12th, 13th and 14th days of pregnancy, ...

Most research on embryonic learning and behavior in aquatic vertebrates has focused fitness benefits after hatching, but the ability of embryos to perceive respond environmental stimuli may also have immediate adaptive value. Here, we examined whether fathead minnow embryos, Pimephales promelas, detect cues indicative predation risk, environment influences hatching. We compared 5-day-old post-f...

Background: The opportunity to completely ‘stop biological time’ using cryopreservation, as it is used in embryo provides for the selection and long-term storage of high-quality preimplantation embryos future usage. While this a beneficial medical procedure, has however posed some legal issues such status an embryo, ownership reproductive autonomy, posthumous reprodu...

The aim of this study was to examine the possible morphological and morphometric changes resulting from vitrification of embryos at the cleavage stage. In this study, 30 mice early-cleavage embryos at different stages of cleavage, resulting from in vitro fertilization (IVF) techniques, were examined before and after vitrification. Digital images were taken from embryos before and after vitrific...

Background: Mammalian preimplantation development is a complex process involving dramatic changes in the transcriptional architecture. However, it is still unclear about the crucial transcriptional network and key hub genes that regulate the proceeding of preimplantation embryos. Materials and Methods: Through single-cell RNAsequencing (RNA-seq) of both human and mouse preimplantation embryos, ...

Background Melatonin (N-acetyl-5- methoxytryptamine) is mainly synthesized and secreted in the pineal gland, ovary, testes, bone marrow, retina and lens in mammalian species. It is involved in the detoxification of ROS and protects embryos from oxidative damage. Melatonin acts as a potential free radical scavenger, including peroxyl radical and hydroxyl radical. In addition, it can stimulate th...