Ultrasound-Based Nomogram Predicts Fetal Lung Maturity in Late Pregnancy: A Noninvasive Approach

This study developed a noninvasive ultrasound-based nomogram to predict fetal lung maturity in 195 late-term pregnancies. Key predictors included gestational diabetes mellitus, placental maturity, and fetal biparietal diameter. The model achieved good discrimination (AUC 0.871) and clinical utility validated by bootstrap resampling and 10-fold cross-validation. Findings support ultrasound as a practical tool for prenatal FLM assessment, potentially reducing reliance on invasive testing.