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Randomized IVF evidence supports elective single-embryo transfer as a strategy to reduce multiple gestation while preserving good cumulative reproductive outcomes when additional embryos are available for later transfer. The approach is particularly relevant for younger patients with favorable prognosis. Multiple pregnancy increases maternal and neonatal risks, including preterm birth and hypertensive complications. For fertility specialists, embryo selection, cryopreservation quality and counseling become central to making single-embryo transfer successful. The clinical objective is not simply to maximize pregnancy rate per fresh transfer but to optimize healthy singleton live birth across the full treatment course. This shift is especially important for patient counseling, because transferring more than one embryo can create the impression of a higher chance of success while increasing downstream risk. Evidence-based ART therefore increasingly emphasizes cumulative live birth and healthy singleton outcomes rather than transfer-cycle pregnancy rate alone.
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Randomized IVF evidence supports elective single-embryo transfer as a strategy to reduce multiple gestation while preserving good cumulative reproductive outcomes when additional embryos are available for later transfer. The approach is particularly relevant for younger patients with favorable prognosis. Multiple pregnancy increases maternal and neonatal risks, including preterm birth and hypertensive complications. For fertility specialists, embryo selection, cryopreservation quality and counseling become central to making single-embryo transfer successful. The clinical objective is not simply to maximize pregnancy rate per fresh transfer but to optimize healthy singleton live birth across the full treatment course. This shift is especially important for patient counseling, because transferring more than one embryo can create the impression of a higher chance of success while increasing downstream risk. Evidence-based ART therefore increasingly emphasizes cumulative live birth and healthy singleton outcomes rather than transfer-cycle pregnancy rate alone.
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