Preimplantation genetic testing
It can also test to see if the embryo has a different number of chromosomes than normal. This is called preimplantation genetic testing for aneuploidy, or PGT-A. The other types of preimplantation genetic testing are for gene (monogenic) disorders (PGT-M), for many gene (polygenic) disorders (PGT-P), for seeing if large parts of the chromosomes are improperly put together (PGT-SR).