Rathore, Neha, Reema Khajuria, and Rohini Jaggi. “β-HCG Levels in Second Trimester As a Predictor of Gestational Hypertension and Preeclampsia”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 11, no. 2 (January 28, 2022): 433–438. Accessed April 25, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/11227.