Preimplantation Genetic Testing (PGT) is a genetic test used during in vitro fertilization (IVF) to analyze embryos for genetic disorders or chromosomal abnormalities before they are implanted in the uterus. There are different types of PGT:

1. PGT-A (Aneuploidy Screening): This type of testing screens embryos for aneuploidy, which is the presence of an abnormal number of chromosomes. PGT-A helps identify embryos with the correct number of chromosomes, reducing the chances of implanting embryos that may result in miscarriage or chromosomal disorders.

2. PGT-M (Monogenic/Single Gene Disorders): PGT-M is used to test for specific genetic conditions or single gene disorders that are known to be in the family history of the parents. This testing allows for the selection of embryos free of the genetic mutation before implantation.

3. PGT-SR (Structural Rearrangement): PGT-SR is performed when one or both parents have a known chromosomal rearrangement, such as translocations or inversions. This testing helps select embryos without the specific chromosomal rearrangement, reducing the risk of miscarriage or birth defects.

PGT is typically recommended for couples at risk of passing on genetic disorders, advanced maternal age, recurrent miscarriages, or those who have had multiple failed IVF cycles. By screening embryos before implantation, PGT can improve the chances of a successful pregnancy and reduce the risk of passing on genetic conditions to