Vanishing twin syndrome and fetal reduction adversely affect perinatal outcomes following IVF-FET: an analysis based on 33,238 ongoing pregnancies

Key Points

• Perinatal outcomes are negatively affected by vanishing twin syndrome, with higher risks observed.
• Fetal reduction is associated with increased complications in 33,238 ongoing pregnancies analyzed.
• Observational analysis involved a large dataset to assess the impact on clinical outcomes.
• Findings may encourage better management strategies in IVF-related pregnancies to reduce risks.