One of the most common causes for recurrent pregnancy loss in both normal as well as IVF pregnancies is the presence of incorrect number of chromosomes. If there are extra or missing chromosomes, the embryo is abnormal and it may lead to a spontaneous abortion. Even if the pregnancy is complete, the child will be abnormal.
Thus screening of the embryos before implantation can help improve the chances of a successful pregnancy outcome and a healthy baby.
PGS is a genetic test which involves screening of embryos before they are implanted in the patient during the IVF treatment. This screening helps differentiate the chromosomally normal embryos from abnormal ones. By planting the normal or healthy embryos, the chances of conception are significantly improved.