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Published on: January 27, 2010
The relationship between cervical dilatation at initial presentation in labour and subsequent intervention.
P Holmes1, L W Oppenheimer, S W Wen
1Division of Maternal-Fetal Medicine, Ottawa Hospital, University of Ottawa, ON, Canada.
BJOG : an International Journal of Obstetrics and Gynaecology
|January 5, 2002
Summary
Women presenting in early labor (0-3cm dilatation) face higher rates of cesarean section and obstetric intervention compared to those in advanced labor. Outcomes were similar regardless of initial hospital admission. This highlights the importance of timing in labor presentation.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Clinical Obstetrics
Background:
- Cervical dilatation at labor presentation is a key factor in obstetric management.
- Understanding this relationship can inform clinical decision-making and patient counseling.
Purpose of the Study:
- To investigate the association between cervical dilatation upon presentation in labor and the subsequent risk of cesarean delivery.
- To explore secondary outcomes including operative vaginal delivery, labor duration, and interventions.
Main Methods:
- Retrospective cohort study involving 3,220 women delivering between 1995 and 1999.
- Inclusion criteria: spontaneous labor, singleton pregnancy, cephalic presentation, 37-42 weeks gestation, delivery within 36 hours of presentation.
- Exclusion criteria: rupture of membranes before first attendance.
Main Results:
- Cesarean section risk decreased significantly with increasing cervical dilatation at presentation for both nulliparous and parous women (P < 0.0001).
- Nulliparous women presenting at 0-3cm had a 10.3% cesarean rate versus 4.2% for those at 4-10cm.
- Early presenters received more oxytocin and epidural analgesia; outcomes were similar whether sent home or admitted.
Conclusions:
- Presenting with less cervical dilatation (0-3cm) is associated with longer labor duration before presentation and increased likelihood of obstetric intervention, including cesarean section.
- Hospital admission policies (immediate vs. sent home) did not significantly alter cesarean section rates.
