Thangjam Chitralekha Devi, and Huidrom Suraj Singh. “Prevalence and Associated Risk Factors of Preterm Birth in India: A Review”. Journal of Public Health and Development 19, no. 2 (May 25, 2021): 209–226. Accessed May 9, 2024. https://he01.tci-thaijo.org/index.php/AIHD-MU/article/view/246332.