None
Conditions
Interventions
Observation group:none
Sponsors
The Third Affiliated Hospital of Sun Yat-sen University
Eligibility
Sex/Gender
Female
Age
20 Years to No maximum
Inclusion criteria
Inclusion criteria: 1 ) Primipara, >= 20 years old. 2 ) head position, full-term ( gestational age >= 37 weeks ), single live birth. 3 ) No vaginal delivery contraindications. 4 ) Voluntary to join this study.
Exclusion criteria
Exclusion criteria: 1 ) Patients who have decided to undergo elective or emergency cesarean section for various reasons ( fetal distress, placental abruption, umbilical cord prolapse, voluntary requirements, etc. ) ; 2 ) Refusing to sign informed consent for any reason ; 3 ) Can not cooperate with the inspector for any reason.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| angle of progression;Head-perineum distance;subpubic arch angle;The area of levator hiatus of pregnant women in resting state;The area of levator hiatus in pregnant women under contraction state;Area of levator hiatus in pregnant women under Valsalva state;Cervical length; | — |
Secondary
| Measure | Time frame |
|---|---|
| biparietal diameter;head circumference;abdominal perimeter;femur length;weight; | — |
Countries
China
Contacts
Public ContactHuang Zeping
The Third Affiliated Hospital of Sun Yat-sen University
Outcome results
None listed