Department;
of;
Obstetrics;
and;
Gynecology,;
Xiehe;
Hospital,;
Tongji;
Medical;
College,;
Huazhong;
University;
of;
Science;
and;
Technology,;
Wuhan;
430022;
Department;
of;
Obstetrics;
and;
Gynecology,;
Xiehe;
Hospital,;
Tongji;
Medical;
College,;
Huazhong;
University;
of;
Science;
and;
Technology,;
Wuhan;
430022;
Department;
of;
Obstetrics;
and;
Gynecology,;
Xiehe;
Hospital,;
Tongji;
Medical;
College,;
Huazhong;
University;
of;
Science;
and;
Technology,;
Wuhan;
430022;