Pre - Before
Implantation - Process of embryo sticking to inner layer of uterus - endometrium
Genetic - Study of genetic constitution of embryo
Diagnosis - Diagnosis
Pre-implantation genetic diagnosis - PGD is a latest technique, which has revolutionized the possibility of diagnosing genetic disorders of the child to be born BEFORE even the pregnancy actually begins. PGD is a blessing for the patients who are likely to have a child affected by a known genetic disorder or when possibility of a child being born with genetic abnormality is high.
Medical sciences has discovered that many diseases are caused by faulty genes. Defect in genes in the parents can be transmitted to their children and the child may be born with the disease. Some gene defects may not be present in the parents but develop during the process of fertilization.
If we do biopsy of an embryo and take out one or two cells ( blastomeres ) from the embryo and study the genetic constitution of the embryo we can diagnose, whether the embryo is having normal genes or has gene defect and how much is the possibility of the child being affected by the disease.