二胎孕妇不良分娩结局及其影响因素分析
关锐, 马宁, 王园园
Adverse delivery outcomes and its influencing factors of second-born pregnant women
GUAN Rui, MA Ning, WANG Yuan-yuan
华南预防医学 . 2020, (6): 601 -604 .  DOI: 10.12183/j.scjpm.2020.0601