TeachMeFinance.com - explain Preimplantation
Preimplantation The term 'Preimplantation' as it applies to the area of stem cell research can be defined as 'With regard to an embryo, preimplantation means that the embryo has not yet implanted in the wall of the uterus. Human embryonic stem cells are derived from preimplantation-stage embryos fertilized outside a woman's body (in vitro)'.
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