Video highlights best candidates for IVF


THE success rate of IVF could be improved following video footage of developing early-stage embryos. Renee Reijo Pera’s group at Stanford University in California filmed the development of 242 human zygotes – fertilised egg cells that have not yet divided. The team watched them develop from the one-cell stage, between 12 and 18 hours after fertilisation, until a blastocyst had formed five or six days later. The formation of this two-layered ball of cells, which goes on to form the embryo and placenta,
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