نتایج جستجو برای: human embryos
تعداد نتایج: 1677642 فیلتر نتایج به سال:
BACKGROUND Aneuploidy is one of the major factors that result in low efficiency in human infertility treatment by in vitro fertilization (IVF). The development of DNA microarray technology allows for aneuploidy screening by analyzing all 23 pairs of chromosomes in human embryos. All chromosome screening for aneuploidy is more accurate than partial chromosome screening, as errors can occur in an...
Bone morphogenetic proteins (BMPs) are multifunctional growth factors implicated in multiple biological events. Studies on mice, chickens and other experimental animals have shown that BMP signalling plays critical role in embryonic development, in particular in the neural patterning. In our study we comparatively evaluated BMP-2 and BMP-4 protein expression in the developing spinal cord of hum...
In March 1999 Bradley Richard Smith, a professor at the University of Michigan [4], unveiled the first digital magnetic resonance images of human embryos. In his article ?Visualizing Human Embryos? for Scientific American, Smith displayed three-dimensional images of embryos using combinations of Magnetic Resonance Microscopy [5] (MRM), light microscopy [6] , and computer editing. He created vir...
STUDY QUESTION Is the quality of the human embryos generated by twinning in vitro comparable to the quality of the embryos created by fertilization? SUMMARY ANSWER Our data suggest that the human twin embryos created in vitro are unsuitable not only for clinical use but also for research purposes. WHAT IS KNOWN ALREADY Pregnancy from in vitro generated monozygotic twins by embryo splitting ...
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