نتایج جستجو برای: human embryos
تعداد نتایج: 1677642 فیلتر نتایج به سال:
BACKGROUND Hundreds of thousands of human embryos are cultured yearly at in vitro fertilization (IVF) centers worldwide, yet the vast majority fail to develop in culture or following transfer to the uterus. However, human embryo phenotypes have not been formally defined, and current criteria for embryo transfer largely focus on characteristics of individual embryos. We hypothesized that embryo ...
STUDY QUESTION Is the attachment of biofunctionalized polysilicon barcodes to the outer surface of the zona pellucida an effective approach for the direct tagging and identification of cultured embryos? SUMMARY ANSWER The results achieved provide a proof of concept for a direct embryo tagging system using biofunctionalized polysilicon barcodes, which could help to minimize the risk of mismatc...
The French law on bioethics, voted upon in July 1994, is going to be revised. This is the occasion for France to reconsider its position concerning research on human embryos, which is currently prohibited in France, as it is in Germany, Switzerland and Austria. However, such research is authorised in other European countries such as the UK, Spain, Belgium, Italy and The Netherlands. The establi...
gibberellic acid (ga3) is a group of plant hormones identified in various plants. the aim of this study was to determine the effects of ga3 on sperm parameters and in vitro fertilization (ivf). fifty six adult male rats were divided into seven groups as, control, treatment and sham. following 15, 30 and 45 days of ga3 and methanol alcohol (ma) administration, rats were euthanized and epididymis...
Nonhuman primate (NHP) models, the most predictive preclinical models for human diseases and treatment outcomes, are in high demand limited supply. There is a need improved cryopreservation methods routine storage of gametes embryos, which vital to protecting unique genetic as well providing resources enhancing diversity NHP colonies.
Background: A prerequisite for successful embryo implantation is adequate preparation of receptive endometrium and the establishment and maintenance of a viable embryo. The success of implantation further relies upon a two-way dialogue between the embryo and uterus. However, molecular bases of these preimplantation and implantation processes in humans are not well known. Materials and Methods: ...
Background: Human embryonic stem (hES) cells have the unrivaled ability to differentiate into any specialized cell type. Significant attention is currently directed to the biological and therapeutic capabilities of these cells for developing novel treatments for acute and chronic diseases including heart disease, diabetes, Parkinson's disease, Alzheimer's disease, multiple sclerosis, spinal i...
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