. In many uses of in vitro fertilization, numerous eggs are fertilized, then the doctor chooses the one or possibly two embryos that look most likely to survive. The doctor implants those embryos in the woman’s womb and then destroys the others. But this is the destruction of human life, and should not be considered morally acceptable. This process is often accompanied by preimplantation genetic diagnosis (PGD).20 This is the most commonly used genetic