1,100
Participants
Start Date
March 17, 2025
Primary Completion Date
December 31, 2026
Study Completion Date
December 31, 2027
Vitamin C
Vitamin C tablets, please instruct the patient to swallow with water, 500mg twice daily, morning and evening.
Placebo
Tablets with the same material, flavor, and appearance as the intervention group.
RECRUITING
Beijing Obstetrics and Gynecology Hospital,Capital Medical University, Beijing
RECRUITING
Peking university third hospital, Beijing
RECRUITING
Peking University Shenzhen Hospital, Shenzhen
RECRUITING
Tang Du Hospital, Xi’an
RECRUITING
General Hospital of Ningxia Medical University, Yinchuan
RECRUITING
The second hospital of Hebei Medical University, Shijiazhuang
Beijing Obstetrics and Gynecology Hospital
OTHER
Peking University Shenzhen Hospital
OTHER
Tang-Du Hospital
OTHER
General Hospital of Ningxia Medical University
OTHER
The Second Hospital of Hebei Medical University
OTHER
Peking University Third Hospital
OTHER