Unveiling risk factors and developing a predictive nomogram for ectopic pregnancy in polycystic ovary syndrome patients undergoing assisted reproductive technology

This study identifies three key predictors of ectopic pregnancy in younger PCOS (<35 year) patients undergoing ART: IVF cycle number, endometrial thickness, and frozen embryo transfer. The developed nomogram provides a validated assessment tool, particularly for younger patients. These findings highlight the need for personalized risk stratification and further research into underlying mechanism.