Preimplantation   genetic  testing       for  aneuploidy (PGT-A) is a procedure used to screen embryos  for chromosomal   abnormalities   before    implantation during in vitro fertilization (IVF). It involves removing a few cells from an  embryo   and   analyzing     their chromosomes for conditions like  Down   syndrome, trisomy 18,  and  other     chromosomal      disorders. PGT-A   helps   identify   embryos   with   the correct number of chromosomes, increasing the chances of a successful pregnancy. This   test   is    particularly useful for   women   of   advanced    maternal age or those with a history of     recurrent       miscarriages. PGT-A  can reduce the risk of genetic disorders and improve   IVF   success    rates.   The   procedure  is performed after embryo biopsy and genetic testing. Although it enhances embryo  selection, it  is  not  a diagnostic    test     for     all      genetic    conditions.