Shen ZongJi1, Chen Xiao-Ping2*, Wang WanXiang3, Liu HongMei2 and Ren XinPing2
1Department of Obstetrics and Gynecology, First Affiliated Hospital of Soochow University, Suzhou 215006, China.
2Department of Obstetrics and Gynecology, YanCheng 1st People Hospital, YanCheng City 224000 Jiangsu, China.
3Clinical laboratory, YanCheng 1st People Hospital, YanCheng City 224000 Jiangsu, China.
