Non‐Linear Association Between Maternal Body Mass Index and Clinical Outcomes in Single Euploid Embryo Transfer: A Retrospective Cohort Study of 4235 Cycles

Key Points

• The aim is to investigate the non-linear relationship between maternal BMI and clinical outcomes in single euploid embryo transfers.
• Retrospective cohort study design
• Analysis of 4235 embryo transfer cycles
• Examination of pregnancy establishment and continuation based on maternal BMI
• Underweight significantly hinders pregnancy establishment
• Obesity adversely affects both pregnancy establishment and continuation
• Supports individualized, stage-informed counselling for weight management