KHAWAR, A.; SAEED, M.; HUSSAIN, N.; SHARIF, S.; MEHAR, F. K.; 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. Pakistan Journal of Health Sciences, Pakistan, v. 7, n. 5, p. 13–20, 2026. DOI: 10.54393/pjhs.v7i5.3755. Disponível em: https://thejas.com.pk/index.php/pjhs/article/view/3755. Acesso em: 1 jun. 2026.