Placenta previa
Conditions
Interventions
Observation group:None
Sponsors
The Second Affiliated Hospital Of Zhengzhou University
Eligibility
Sex/Gender
Female
Age
19 Years to 50 Years
Inclusion criteria
Inclusion criteria: 1. During early pregnancy (11-13+6 weeks), an ultrasound examination confirms they meet the diagnostic criteria for low-lying placenta; 2. They have established perinatal care records in this hospital and completed standardized regular prenatal check-ups; 3. They possess complete series of prenatal follow-up records, including delivery outcome information; 4. Their pregnancy medical records are complete and can trace the history of pregnancy-related complications and comorbidities.
Exclusion criteria
Exclusion criteria: 1. Abnormal pregnancy outcomes: including spontaneous abortion, therapeutic abortion, embryonic development arrest, or stillbirth; 2. Severely incomplete data: missing key ultrasound images, missing two or more consecutive scheduled prenatal check-ups, or missing delivery outcome records.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 1. Specific measurement value of the distance between the lower edge of the placenta and the cervical opening (mm); 2. Orientation of placental attachment (anterior wall, posterior wall, lateral wall,; | — |
Countries
China
Contacts
Public ContactYu Hongxia
The Second Affiliated Hospital Of Zhengzhou University
Outcome results
None listed