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What are PGD and PGS?
Dr. Edward Marut, of Fertility Centers of Illinois, explains the difference between PGD (preimplantation genetic diagnosis) and PGS (preimplantation genetic screening), and how PGD and PGS are used to screen embryos during IVF treatment. PGD looks for a very specific abnormality in the embryo. PGS looks at a wider number of chromosomal abnormalities.