The preimplantation genetic diagnosis or PGD consists of the genetic analysis of an embryo cell to know if it suffers any genetic alteration. This cell biopsy is normally done 3 days after ICSI when the embryo has approximately 8 cells. However, it is also possible to do PGD with blastocysts, by biopsy several cells of the trophectoderm.
For more information related to this topic, you can follow the reading by clicking here: What Is PGD or Preimplantation Genetic Diagnosis?
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