Predictive Value of 20-week Ultrasound Scan of Fetal Bowel Diameter for Adverse Pregnancy Outcome 
LI Na,SU Jianqiang,SUN Congxin,ZHANG Yanhong,ZHAO Wei,GENG Xuna,WANG Weijing
Chinese General Practice . 2021, (18): 2314 -2317 .  DOI: 10.12114/j.issn.1007-9572.2021.00.494