Resultados clínicos: Embriões frescos VS. Criopreservados

Abstract

Infertility affects approximately 17.5% of the adult population worldwide, representing a significant public health problem. With advances in assisted reproduction techniques, especially in vitro fertilization (IVF), different therapeutic approaches have emerged, highlighting fresh embryo transfer (FET) and cryopreserved embryo transfer (CET). This study aimed to compare clinical outcomes between FET and CET through systematic literature review (2020-2025) and retrospective analysis of clinical data from a human reproduction center in Goiânia-GO, referring to 2023. The methodology was based on quantitative, bibliographic and descriptive research, following PRISMA guidelines for systematic review. Twenty studies from the literature were analyzed, totaling 158,295 embryo transfers, and 446 patients from local retrospective analysis. Results showed that CET presented higher implantation rates (46% vs. 39%), clinical pregnancy (52% vs. 44%) and live births (35% vs. 29%) compared to FET, with significant reduction in ovarian hyperstimulation syndrome risk. Local data demonstrated CET predominance (89.7% of transfers), although FET showed slightly higher success rate per procedure (70% vs. 55%). It was concluded that both techniques are valid and complementary, and the choice should be individualized according to the patient's clinical profile, considering factors such as ovarian reserve, risk of complications and laboratory context.