What is the primary goal of preimplantation genetic testing?

The primary goal of preimplantation genetic testing is to screen for genetic abnormalities before implantation. This testing allows for the examination of embryos created through in vitro fertilization to identify any genetic disorders or conditions that could be passed on to the offspring. By assessing embryos for abnormalities prior to implantation, healthcare providers can select the healthiest embryos, thereby improving the likelihood of a successful pregnancy and reducing the risk of genetic conditions in the child.

In this context, the other options are less accurate descriptions of the testing's purpose. Increasing the chances of embryo survival is a secondary outcome that may stem from selecting healthier embryos but is not the primary intent of the testing. Testing embryos for sex to implant a specific gender is ethically controversial and often restricted, as it does not address genetic health issues. Enhancing physical traits of the embryo goes beyond the scope of preimplantation genetic testing, which focuses primarily on identifying genetic risks and abnormalities rather than modifying traits.