4,000
Participants
Start Date
January 1, 2021
Primary Completion Date
November 30, 2025
Study Completion Date
December 31, 2025
No intervention
It's only observational study. No interventions.
RECRUITING
Children's Hospital of Fudan University, Shanghai
International Peace Maternity and Child Health Hospital
OTHER
Obstetrics & Gynecology Hospital of Fudan University
OTHER
Xinhua Hospital, Shanghai Jiao Tong University School of Medicine
OTHER
Shanghai Children's Medical Center
OTHER
Shanghai Children's Hospital
OTHER
Children's Hospital of Fudan University
OTHER