455
Participants
Start Date
January 1, 2022
Primary Completion Date
December 31, 2023
Study Completion Date
December 31, 2023
intrapartum ultrasound
In IPUS group, the patient's labor was observed by intrapartum ultrasound.
vaginal examination
In VE group, the patient's labor was observed by vaginal examination.
Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou
Third Affiliated Hospital, Sun Yat-Sen University
OTHER