Kulkarni N, Bansal R, Pawar P. Serum Beta HCG and uterine artery Doppler studies in second trimester to predict preeclampsia and eclampsia. Int J Reprod Contracept Obstet Gynecol [Internet]. 2018 Apr. 28 [cited 2025 Oct. 26];7(5):1924-8. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/4688