High risk pregnancy associated perinatal morbidity and mortality: a second birth population-based survey in Huai'an in 2015

Zhu X, Niu H, Wang H, Li X, Qi T, Ding W, Han L, Zhang M, Guan H, Li S, Tang C, Yin Y, Cao X, Liu H, Gao C, Yue H, Sun B. High risk pregnancy associated perinatal morbidity and mortality: a second birth population-based survey in Huai'an in 2015. BMC Pregnancy Childbirth. 2019; 19(1): 224.