IVF used by some to avoid passing on genetic diseases to offspring

Parents who know they carry genetic mutations for muscular dystrophy, cystic fibrosis, sickle cell anemia, breast cancer, Huntington’s disease, Alzheimer’s and other inherited diseases can undergo IVF, where the mother’s eggs are collected and combined with sperm in a dish, and another procedure called preimplantation genetic testing (PGT), in which embryos are screened for the particular mutation and only disease-free embryos can be implanted in the mother.