สันติภาพ ม. (2019). The Incidence of Short Cervix in Singleton Pregnant Women between 16 and 24 Weeks of Gestation in 2017-2018. Journal of Preventive Medicine Association of Thailand, 8(3), 352–359. Retrieved from https://he01.tci-thaijo.org/index.php/JPMAT/article/view/167701