Kochhar, Sonia, Jit Swaran, and Ashwani Ummat. “Study of Autonomic Sympatho-Vagal Modulation in Different Trimesters of Pregnancy”. International Journal of Medical Research and Review 4, no. 5 (May 31, 2016): 751-757. Accessed November 23, 2024. https://ijmrr.medresearch.in/index.php/ijmrr/article/view/552.