Normative range for MRI amniotic fluid volume from 16 to 36 gestational weeks: Absolute and relative values, and correlation to ultrasound

This study provides the first MRI-based normative charts for AFV and AFV/FBV ratio between 16 and 36 weeks' gestation. The AFV/FBV ratio represents a novel physiological marker integrating fetal growth and fluid balance. These reference ranges may support future research and clinical decision-making.