  The widespread practice of prenatal genetic testing (traditionally through chorionic villus sampling or amniocentesis in the second trimester of pregnancy, but now more routinely done through non-invasive blood tests in the first trimester, at least as a first screen), similarly presents the opportunity for individuals or couples to identify genes or genetic markers for traits they prefer for their future children not to have. If prenatal testing identifies an undesired gene variant, prospective parents may choose to abort the fetus, often with the plan to later attempt a new pregnancy. Studies suggest that approximately 80 to 90% of parents terminate pregnancies identified with certain disorders (Rothschild 2005, Blakeley et al 2019). With the advent of preimplantation genetic testing, prospective parents can choose to use IVF, and then test early cells of the created embryos to identify embryos with genomic variants they favor or those prefer to avoid. In this way, they preclude the potential need for abortion by choosing to implant only embryos that contain the desired genes.