In IVF treatment blastomer biopsy can be done after 72 hours of insemination when the embryo is made of 6-8 cells. It is possible to remove one to two blastomers . But 2 blastomers biopsy can affect embryo viability. This technique is compatible with fresh embryo transfer on day 5-6 of embryo development, genetic results will usually be available one to two days after blastomere biopsy.