What is Preimplantation Genetic Diagnosis used for?

Preimplantation Genetic Diagnosis (PGD) is specifically designed to test embryos for genetic mutations prior to implantation during the in-vitro fertilization (IVF) process. This technique allows clinicians to identify genetic disorders or specific mutations within embryos, enabling prospective parents to select embryos that do not carry these genetic conditions for implantation. This practice is particularly valuable for couples with a known risk of passing on genetic disorders, helping to ensure a healthier lineage and reduce the likelihood of genetic diseases in their offspring.

Other options relate to different stages or contexts of genetic testing. For instance, treating genetic disorders is typically achieved through various therapies post-diagnosis, rather than through PGD. Screening newborns for abnormalities occurs after birth and not during the preimplantation stage. Analyzing genetic traits in adults serves a different purpose, often related to personal genomics or risk assessment rather than embryo selection. Therefore, option B accurately describes the primary function and application of Preimplantation Genetic Diagnosis.