Every child a perfect child?

摘要

Medical history could be made early next year. A couple from the north of England are hoping that their embryos, conceived by in vitro fertilisation, will be the first to be screened for a gene that could cause cancer in later life. Only those deemed not to have inherited the gene will be transferred to the woman's womb. Preimplantation screening was first used in 1990, and involves the genetic analysis of a single cell taken from an eight-cell embryo, when it is just a few days old.