What is Preimplantation Genetic Diagnosis (PGD)?

Preimplantation genetic diagnosis (preimplantation genetic diagnosis) is to take 1-2 blastomeres or partial trophoblasts from embryos on the 3rd day or embryo sac on the 5th day of in vitro fertilization, and perform cell and molecular genetic testing to detect Pathogenic genes and abnormal karyotype embryos, embryos with normal genes and karyotypes are transferred to obtain healthy offspring.