XU, Jing, Junhu WANG, Shuxia XUAN, Guiying FANG, Jinjing TIAN, and Yucui TENG. “The Effects of Childbirth Age on Maternal and Infant Outcomes in Pregnant Women”. Iranian Journal of Public Health 47, no. 6 (June 20, 2018): 788-793. Accessed November 17, 2019. http://ijph.tums.ac.ir/index.php/ijph/article/view/13753.