When to Expect Labor After Starting Cervidil
If Cervidil is started in two days, you should expect labor to begin within 12-24 hours after insertion, with most women delivering within 16-17 hours on average.
Timeline Breakdown
According to the FDA label, Cervidil (dinoprostone vaginal insert) is designed to be used for up to 12 hours and should be removed either at 12 hours or upon onset of active labor, whichever comes first 1. The insert releases approximately 0.3 mg of dinoprostone per hour during this period 1.
Expected Time to Delivery
From the research evidence:
- The mean time from Cervidil insertion to vaginal delivery is approximately 15.7-16.9 hours 2
- 36% of women deliver within 12 hours of starting Cervidil 2
- 64% deliver within 18 hours 2
- 81% deliver within 24 hours 2
What Happens After the Insert
After Cervidil is removed (at 12 hours or when active labor begins):
- If the cervix has ripened sufficiently but labor hasn't started, oxytocin may be administered at least 30 minutes after removal 1
- The ARRIVE trial protocol recommended allowing at least 12 hours after completion of cervical ripening before considering cesarean delivery for failed induction 3
Practical Expectations
Most likely scenario: Labor begins during or shortly after the 12-hour Cervidil application, with delivery occurring within 16-24 hours total from insertion.
If cervix is very unfavorable (Bishop score <4): The process may take longer, potentially requiring oxytocin augmentation after Cervidil removal, extending the timeline to 24+ hours 4.
Important caveat: These timelines assume successful cervical ripening. In 15-20% of cases, additional interventions beyond Cervidil alone may be needed 5, 6.