Preimplantation genetic testing (PGT) examines embryos during in vitro fertilization (IVF) before possible transfer to a woman’s uterus for a range of genetic problems that can cause implantation failure, miscarriage and birth defects in a resulting child. Preimplantation genetic testing refers to the three types of tests that may be performed on embryos during IVF:

• Preimplantation genetic screening for abnormal chromosome number (PGT-A)

• Preimplantation genetic testing for…