PGT-A indicates preimplantation genetic testing for aneuploidy; SART, Society for Assisted Reproductive Technology.
aExclusions were not mutually exclusive.
bThe American Society for Reproductive Medicine recommends that anonymous donors be between 21 and 34 years of age. All included cycles used only anonymous oocyte donors. Cycles that were missing documentation of donor age were included. A total of 337 (2.2%) fresh embryo transfer cycles and 17 694 (48.3%) cryopreserved-thawed embryo transfer cycles were missing donor age data.