简介：AbstractObjective:The objective of this study is to study whether preimplantation genetic testing for aneuploidy (PGT-A) improves the clinical outcomes of infertile patients with repeated implantation failure (RIF) undergoing frozen-thawed embryo transfer.Methods:This is a retrospective analysis of clinical pregnancy, live birth, miscarriage rates, and obstetric and perinatal outcomes of women with RIF with or without PGT-A. Statistical analyses of categorical data were performed using propensity score matching (PSM), χ2 test, and Student’s t test.Results:We enrolled 466 patients with RIF, of which, 209 were in the RIF-PGT-A group. The rate of euploid blastocysts was significantly associated with age and day 5 or 6 blastocysts. There were significant differences between the RIF-PGT-A group and the RIF-non-PGT-A group across several parameters. After PSM, positive serum human chorionic gonadotropin (56.9% and 33.9%, P<0.01), clinical pregnancy (49.5% and 31.2%, P<0.01), live birth (43.1% and 25.7%, P<0.01), and fetal heart rates (50.0% and 29.8%, P<0.01) per transfer were significantly higher in the RIF-PGT-A group.Conclusion:Elective single-embryo transfer PGT-A can minimize the risk of obstetric and perinatal outcomes, especially fetal body weight, in women with RIF. Additionally, PGT-A can significantly improve pregnancy and live birth rates.