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Penn study shows lower Cesarean rates associated with preventive labor induction
July 31, 2007Finding challenges conventional belief that inducing labor leads to increases C-sections
PHILADELPHIA -- At a time when national rates of cesarean delivery have climbed above 30%, a four-year study of patients receiving an alternative method of obstetric care experienced a significantly lower rate of cesarean births, according to a study published in the current issue of the Annals of Family Medicine. The study, conducted by researchers at the University of Pennsylvania School of Medicine, reports that a cohort of women exposed to a safe, alternative method of maternity care had a 5.3 percent cesarean delivery rate compared to a 11.8 percent of women who received more traditional care.
The new approach uses a method of pregnancy dating and risk scoring to estimate an optimal time of delivery for each pregnancy. If spontaneous labor has not occurred by this time, preventive labor induction is performed, increasing the likelihood that labor occurs before the fetus has grown too large for the maternal pelvis or before the placenta has grown too old to support the fetus during labor.
The new approach is called the Active Management of Risk in Pregnancy at Term (AMOR-IPAT). AMOR-IPAT evaluates the risk profile for each pregnancy, and uses each risk profile to estimate an optimal time of delivery. Preventive labor induction is used if a woman does not develop spontaneous labor by the upper limit of her optimal time of delivery. Within the term period, the greater the number an severity of risk factors, the earlier preventive labor induction is offered.
The findings support a preventive approach to reduce cesarean deliveries, and challenge the current belief that the use of labor induction leads to higher cesarean delivery risk. The study was conducted at a rural New England hospital and involved 1,869 women. The results of this study are similar to a 400-patient study from an urban setting, published two years ago, that reported a 4 percent cesarean delivery rate in women exposed to AMOR-IPAT.
"The estimation of an optimal time of delivery, using a combination of accurate pregnancy dating and risk-factor scoring, is a concept that suggests a potentially powerful preventive approach to obstetric care,"¯ says lead researcher, James M. Nicholson, MD, Assistant Professor of Family Medicine and Community Health at Penn. "By using preventive labor induction to ensure that every women enters labor during her optimal time for vaginal delivery, the AMOR-IPAT approach provides significant health benefits for mothers and babies. "¯ Dr. Nicholson also reports that the use of prostaglandin E2 gel for pre-induction cervical ripening, specifically for women scheduled for preventive labor induction who had an unripe cervix, was a key element of in the successful application of AMOR-IPAT.
Vaginal births carry with them a lower rate of morbidity than cesarean births, including decreased chances for post-partum infection and less blood loss. In addition, lower rates of C-section also correspond to lower usage rates in neo-natal intensive care units, shorter lengths of hospital stay for mother and baby, and fewer complications in subsequent pregnancies.
University of Pennsylvania School of Medicine
The new approach is called the Active Management of Risk in Pregnancy at Term (AMOR-IPAT). AMOR-IPAT evaluates the risk profile for each pregnancy, and uses each risk profile to estimate an optimal time of delivery. Preventive labor induction is used if a woman does not develop spontaneous labor by the upper limit of her optimal time of delivery. Within the term period, the greater the number an severity of risk factors, the earlier preventive labor induction is offered.
The findings support a preventive approach to reduce cesarean deliveries, and challenge the current belief that the use of labor induction leads to higher cesarean delivery risk. The study was conducted at a rural New England hospital and involved 1,869 women. The results of this study are similar to a 400-patient study from an urban setting, published two years ago, that reported a 4 percent cesarean delivery rate in women exposed to AMOR-IPAT.
"The estimation of an optimal time of delivery, using a combination of accurate pregnancy dating and risk-factor scoring, is a concept that suggests a potentially powerful preventive approach to obstetric care,"¯ says lead researcher, James M. Nicholson, MD, Assistant Professor of Family Medicine and Community Health at Penn. "By using preventive labor induction to ensure that every women enters labor during her optimal time for vaginal delivery, the AMOR-IPAT approach provides significant health benefits for mothers and babies. "¯ Dr. Nicholson also reports that the use of prostaglandin E2 gel for pre-induction cervical ripening, specifically for women scheduled for preventive labor induction who had an unripe cervix, was a key element of in the successful application of AMOR-IPAT.
Vaginal births carry with them a lower rate of morbidity than cesarean births, including decreased chances for post-partum infection and less blood loss. In addition, lower rates of C-section also correspond to lower usage rates in neo-natal intensive care units, shorter lengths of hospital stay for mother and baby, and fewer complications in subsequent pregnancies.
University of Pennsylvania School of Medicine
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Study suggests obese women should not gain weight
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Study: Health undervalued in reproductive rights debate
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Ben-Gurion U researchers -- bariatric surgery minimizes pregnancy complications for obese women
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Repeat C-section before 39 weeks raises risk of neonatal illness
Women choosing repeat cesarean deliveries and having them at term but before completing 39 weeks gestation are up to two times more likely to have a baby with serious complications including respiratory distress resulting in mechanical ventilation and NICU admission.
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