The preimplantation genetic testing is a laboratory process performed on the embryos produced through IVF. Testing for chromosomally abnormal embryos (PGT-A) and for specific genetic diseases in case of family history (PGT-M) through a biopsy of a few cells on day 5 or 6 according to the embryo development, can prevent the transfer of abnormal embryos that would have resulted in failed implantations, miscarriages or affected children. PGT improves the fertility treatment outcome irrespective of the woman’s age group by: