Prenatal cell-free DNA screening for chromosomal aneuploidies after euploid embryo transfer shows high concordance with preimplantation genetic testing for aneuploidy results and low positive predictive values

To evaluate the positive predictive value (PPV) of prenatal cell-free DNA (cfDNA) screening for chromosomal aneuploidies in pregnancies achieved either after single euploid transfer in in vitro fertilization or Preimplantation Genetic Testing for Aneuploidy (PGT-A) cycles or transfer of single untested embryo, and to assess the concordance of prenatal-cfDNA-screening and PGT-A results.