To compare the ultrasonographic cervical length with the Bishop score in determining the administration of prostaglandin for preinduction cervical ripening in nulliparas at term.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
DOUBLE
Enrollment
154
Assessment of cervical status based on Bishop score versus sonographically measured cervical length
Department of Obstetrics and Gynecology Seoul National University Bundang Hospital
Seongnam-si, Gyeonggi-do, South Korea
Successful labor induction
Induction success was defined as an ability to achieve the active phase of labor corresponding to a cervical dilatation of ≥ 4 cm within 11 hours of initiating oxytocin (i.e., within 22 hours of the administration of a dinoprostone vaginal insert) on the first day of induction.
Time frame: Eleven hours of initiating oxytocin on the fist day of induction
the need for oxytocin induction
1. the interval from start of oxytocin to the active phase of labor 2. the interval from start of oxytocin to delivery 3. vaginal delivery within 24 hours of starting induction 4. the incidence of cesarean delivery
Time frame: After removing prostaglandin, the following day when an intravenous oxytocin infusion was started
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