Xuemei Lin

Sisi Zhang^*,1, 

Xuemei Lin^*,2, 

Li Xiao¹, 

Ya Wang³ 

¹Department of Obstetrics and Gynecology, Jingzhou Hospital, Yangtze University, 

²Department of Obstetrics and Gynaecology, Gong An County People's Hospital, 

³Department of Ultrasound, Zhijiang People's Hospital