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Vaginal Delivery May Be OK After C-Section
Date:7/22/2010

By Serena Gordon
HealthDay Reporter

WEDNESDAY, July 21 (HealthDay News) -- Many women who've had a Cesarean section may be candidates for vaginal birth in future pregnancies, say new guidelines from the American College of Obstetricians and Gynecologists.

"These guidelines emphasize again that a trial of labor after Cesarean is an important option for most women," said one of the authors of the new guidelines, Dr. Jeffrey Ecker, a maternal-fetal medicine specialist at Massachusetts General Hospital in Boston.

Years ago, experts believed that once a woman had undergone a Cesarean birth, she would have to deliver any subsequent pregnancies with a C-section as well. But with changes in surgical procedures and growing evidence to support the possibility of a vaginal birth after a Cesarean (VBAC), attitudes began to shift.

However, in the 1980s and 1990s, as the VBAC rate increased, so did complications related to the procedure. Because of concern over complications and possible legal consequences, the VBAC rate dropped dramatically, from 28.3 percent of deliveries in 1996 to 8.5 percent in 2006. But repeat C-sections also have a risk of complications for mother and baby, the authors of the guidelines noted.

Currently, almost one in three mothers delivers by Cesarean in the United States, according to the study.

More recent studies have supported the idea that many women can successfully deliver vaginally after having had a Cesarean, explained Dr. William Grobman, another author of the new guidelines and an associate professor of obstetrics and gynecology at Northwestern University's Feinberg School of Medicine in Chicago. In March, a National Institutes of Health panel came to the same conclusion and said that a Cesarean delivery in the past doesn't mean a woman must automatically have one in subsequent pregnancies.

The new guidelines recommend counseling women who've had one Cesarean birth using a horizontal incision low in the uterus (low transverse incision) that they are candidates for VBAC, and offering the option of a trial of labor so they can attempt to deliver vaginally.

Between 60 percent and 80 percent of women who attempt VBAC have a successful vaginal delivery, according to the guidelines. Grobman said those numbers are population-based numbers and that for some women, the success rates may be much higher.

The guidelines, published in the August issue of Obstetrics and Gynecology, suggest that the following women may also be candidates for a trial of labor after a Cesarean:

  • Women who've had two previous C-sections using a low transverse incision.
  • Women who've had a C-section with a low transverse incision who are currently pregnant with twins.
  • Women who've had a Cesarean delivery but don't know if they had a low transverse incision.

Some women definitely aren't candidates for VBAC. These include women who've had a vertical incision on the uterus or serious pregnancy complications, such as placenta previa, said Grobman.

"For some women, a VBAC remains an inappropriate choice. But for many, if not most women, choosing a trial of labor when you've had a C-section is an appropriate choice," said Ecker.

The guideline authors hope that women and their health care providers will feel a "sense of shared decision-making," Grobman said. "Rather than provide a directive of 'you can' or 'you can't' do this, doctors need to provide information about the potential risks and successes and let women have autonomy to make their own decision."

Dr. Peter Bernstein, a professor of clinical obstetrics, gynecology and women's health at the Montefiore Medical Center in New York City, said he's very pleased to see the new guidelines.

"Over the last 10 years or so, the pendulum has been swinging too far away from VBAC, and I think they're trying to swing the pendulum back the other way to a more reasonable position and making it available to women who are interested in it," he said.

More information

To learn more about vaginal birth after a Cesarean delivery, see the National Institutes of Health.

SOURCES: Jeffrey Ecker, M.D., maternal-fetal medicine specialist, Massachusetts General Hospital, and associate professor, obstetrics and gynecology, Harvard School of Medicine, Boston; William Grobman, M.D., associate professor, obstetrics, and maternal-fetal medicine specialist, Northwestern University's Feinberg School of Medicine, Chicago; Peter Bernstein, M.D., M.P.H., professor, clinical obstetrics, gynecology and women's health, and director, fellowship program in maternal and fetal medicine, Montefiore Medical Center and Albert Einstein College of Medicine, New York City; August 2010 Obstetrics & Gynecology


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