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Large babies and unplanned Caesarean delivery
J L Onwude1, S Rao, D O Selo-Ojeme
1Department of Obstetrics and Gynaecology, Mid Essex Hospitals NHS Trust, St. John's Hospital, Wood Street, Chelmsford CM2 9BG, Essex, UK. jlonwude@btconnect.com
European Journal of Obstetrics, Gynecology, and Reproductive Biology
|December 15, 2004
Summary
High birth weight babies (≥4000 g) are linked to a doubled risk of unplanned Cesarean delivery. This risk significantly increases to 37.8 times when combined with a prior Cesarean birth.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Perinatal Epidemiology
Background:
- Cesarean delivery rates have been rising globally.
- Understanding risk factors for unplanned Cesarean delivery is crucial for improving maternal and infant outcomes.
- High birth weight, or macrosomia, is a known complication in pregnancy.
Purpose of the Study:
- To investigate the association between high birth weight (≥4000 g) and the likelihood of unplanned Cesarean delivery.
- To quantify the increased risk of unplanned Cesarean delivery associated with macrosomia.
- To examine the combined effect of high birth weight and previous Cesarean delivery on unplanned Cesarean rates.
Main Methods:
- Retrospective cohort study design.
- Analysis of data from 2,393 women delivering babies weighing ≥2500 g at a district general hospital.
- Comparison of delivery modes between babies weighing ≥4000 g and those weighing 2500-4000 g, using regression analysis.
Main Results:
- Women undergoing unplanned Cesarean delivery were more likely to be primiparous and delivered at earlier gestations.
- A birth weight of ≥4000 g was associated with a 2.24-fold increased odds of unplanned Cesarean delivery (P=0.003).
- A history of previous Cesarean delivery increased the odds of unplanned Cesarean delivery by 16.9-fold (P=0.001).
- The combination of a previous Cesarean delivery and a baby weighing ≥4000 g resulted in a 37.8-fold increased odds of unplanned Cesarean delivery.
Conclusions:
- Birth weight ≥4000 g independently increases the risk of unplanned Cesarean delivery by over two-fold.
- The risk of unplanned Cesarean delivery is substantially amplified when high birth weight is combined with a prior Cesarean delivery.
- These findings highlight the importance of considering fetal weight and obstetric history in planning delivery to minimize unplanned Cesarean interventions.