Preimplantation Genetic Diagnosis

What is PGD or sex slection and gender selection?
Preimplantation Genetic Diagnosis (PGD) is a procedure combining recent advances in molecular genetics and assisted reproductive technology. PGD allows physicians to identify various genetic diseases in the embryo (fertilized egg with several divisions) prior to embryo transfer. It is of particular value for those who are at risk of having children with serious genetic problems. These are new investigational procedures requiring removal of one or more cells (blastomeres) from embryos by biopsy. These removed cells are evaluated to determine the presence or absence of specific genetic diseases or genetic abnormalities. After the genetic evaluation of each of the embryos, the embryos lacking the genetic abnormality will be selected for transfer into the uterus for the purpose of establishing a pregnancy. The advantage of using PGD is to lessen substantially the chance of having a child with the particular genetic abnormality analyzed for thereby avoiding the possibility of having to consider terminating the pregnancy later on. PGD is also used for family balancing, as this technique allows for gender identification, and therefore gender selection is possible.