In a new analysis, babies born at home were four times as likely to have seizures as babies born in the hospital. (ISTOCKPHOTO)

The risks attached to giving birth in the home, even with a midwife present, are greater than in the hospital, an analysis of U.S. birth records suggests. A new study has found that babies born at home are 10 times as likely as others to lack a pulse and be unresponsive when they are 5 minutes old.

Still, the overall risk of such a dire condition was low, researchers report in the October issue of the American Journal of Obstetrics & Gynecology. Of every 1,000 babies born at home with a midwife attending, 1.6 lacked a pulse and weren’t breathing five minutes after birth, the researchers found. For hospital births with a doctor, the rate was 0.16 per 1,000 infants.

“It’s a very low occurrence rate,” says Michael Malloy, a neonatologist at the University of Texas Medical Branch in Galveston, who wasn’t part of the study. “I’m not a great advocate of home delivery. It scares me. But I can see the other side, if a woman wishes to have the experience of doing this at home.”

The risk seen in this study far exceeds that found in previous analyses. Those had indicated that, compared with hospital delivery, giving birth at home doubled or tripled the risk of neonatal death. Guidelines from the American College of Obstetricians and Gynecologists cite that level of additional risk and caution that women delivering at home should have ready access to transport to a hospital.

Location matters, says Amos Grünebaum, an obstetric gynecologist and one of the study’s co-authors. Complications that arise during home delivery can be dangerous for mother or baby. Women lose time racing to a hospital, he says. “It’s often difficult to play ‘beat the clock’ to save the baby.”

The new analysis relied on 13 million birth certificates from 2007 to 2010. The vast majority of births occurred in hospitals. Of more than 60,000 home-births attended by a midwife, 98 infants lacked pulse, breath, activity and response to stimulation, and were blue or pale five minutes after birth. Babies born at home were also four times as likely to have seizures as babies born in the hospital, the data showed.

But data from birth certificates can be subjective and unreliable, says Christina Johnson, director of professional practice and health policy for the American College of Nurse-Midwives in Silver Spring. What’s more, these data failed to reveal how many of the pulseless babies were resuscitated. Since the study doesn’t provide the babies’ fate, she says, “it’s a little bit alarmist.”

Grünebaum counters that such infants “are essentially dead.” Reviving them requires extraordinary measures involving a medical staff and an oxygen tube, he says.

Peter Brocklehurst, an obstetrician at University College London, finds the new data difficult to interpret. Those who chose home birth were self-
selected and therefore don’t represent a typical sample of the population. Compared with women giving birth at a hospital, women at home were more likely to be white, age 30 or older, carrying a large baby and delivering late — 41 weeks or more into gestation. Some of those characteristics affect birth risks negatively, he says. Brocklehurst also wonders to what extent the midwives worked within acceptable practice guidelines.

Johnson notes that 97 percent of certified nurse-midwives, who typically hold master’s degrees, work in hospitals. Many home-birth midwives have lesser credentials and training, and their qualifications vary from state to state. In this study, in-hospital births facilitated by midwives had fewer problems than the physician-assisted births.