the researchers focused on the outermost visceral endoderm cells of mouse embryos. By labeling endosomes with fluorescent ...

which occurs several days before the embryo attaches to the uterus. Policy, she said, should take this into account. “From the time of sperm-egg membrane fusion, you have a human being ...

From these embryos, ESCs could be isolated and the genetic ... ensuring that the evolutionary diversity between the two fusion partners was not a rate-limiting step. Clearly, some of this work ...