This document discusses pre-implantation genetic testing (PGT) during in vitro fertilization (IVF). Specifically, it discusses blastomere analysis before implantation (BABI), a type of PGT used to test embryos for cystic fibrosis, Down syndrome, Tay-Sachs disease, and Lesch-Nyhan syndrome. It provides details on the IVF process and each of these genetic conditions. It also discusses the ethical issues surrounding BABI, including debates around eugenics, implications for human life, and religious opposition.