Asghar, Shumaila, Mahpara Shaukat, and Qaiser Javed. “Hyperemesis Gravidarum in the Second Trimester As a Risk Indicator for Preterm Birth: Hyperemesis Gravidarum in the Second Trimester and Preterm Birth”. Pakistan Journal of Health Sciences 6, no. 10 (October 31, 2025): 36–41. Accessed November 4, 2025. https://thejas.com.pk/index.php/pjhs/article/view/3328.