Khawar A, Saeed M, Hussain N, Sharif S, Mehar FK, Ghani N. Diagnostic Value of Umbilical Artery Systolic/Diastolic Ratio and Amniotic Fluid Index for the Prediction of Respiratory Distress Syndrome among Term Pregnancies: A Cross-Sectional Validation Study: UA S/D Ratio and AFI: Respiratory Distress Syndrome among Term Pregnancies. PJHS-Lahore [Internet]. 2026 May 31 [cited 2026 Jun. 1];7(5):13-20. Available from: https://thejas.com.pk/index.php/pjhs/article/view/3755