What does preimplantation genetic testing (PGT) involve?

Preimplantation genetic testing (PGT) is a technique used to analyze embryos created through in vitro fertilization (IVF) for genetic abnormalities before they are implanted into the uterus. This process allows healthcare providers to identify specific genetic disorders or chromosomal abnormalities within the embryos, which can help in selecting the healthiest embryos for implantation and consequently increase the likelihood of a successful pregnancy. By performing PGT, couples who are at risk of passing on genetic conditions can ensure that only embryos without those conditions are used in their fertility treatment.

In contrast, the other options do not accurately represent what PGT entails. Testing for viral infections does not fall under the scope of PGT, which focuses specifically on genetic factors. Analyzing the mother’s genetic profile pertains to assessing her genetic risk but is not part of the embryo's direct testing. Similarly, while assessing the developmental stage of embryos is important in IVF procedures, it is separate from the genetic analysis that PGT provides.