Nimeke nimiösivulta.he FET cycle seemed to provide a better physiological environment for early fetal development than fresh ET. Further, FET protects against some of the adverse perinatal outcomes of children when compared with fresh ET, but not when it comes to the major CAs and early somatic health.This study provides further evidence of the safety of FET in comparison with fresh ET. This information should further encourage clinicians to implement eSET combined with cryopreservation in their IVF/ICSI program.