Uterine function, pregnancy complications, and pregnancy outcomes among female childhood cancer survivors

Objective: To evaluate whether abdominal–pelvic radiotherapy for childhood cancer impairs uterine function and increases the risk of pregnancy complications and adverse pregnancy outcomes. Design: Nested cohort study. Setting: Not applicable. Patient(s): Childhood cancer survivors previously exposed to abdominal–pelvic radiotherapy (RT-exposed CCSs) as part of their treatment for childhood cancer. Intervention(s): Radiotherapy-exposed CCSs (n = 55) were age- and parity-matched to nonirradiated CCSs (non–RT-exposed CCSs; n = 110) and general population controls (n = 110). Main Outcome Measures: Uterine volume, pregnancy complications, and pregnancy outcomes. Result(s): Among nulligravidous participants, median (interquartile range) uterine volume was 41.4 (18.6–52.8) mL for RT-exposed CCSs, 48.1 (35.7–61.8) mL for non–RT-exposed CCSs, and 61.3 (49.1–75.5) mL for general population controls. Radiotherapy-exposed CCSs were at increased risk of a reduced uterine volume (