Can walking, sex or spicy food induce labor?

By the time week 40 finally rolls around, almost every pregnant woman wonders two things. The first: When will labor begin? And the second: How can I get this baby out now?!

In fact, according to a 2011 survey, more than half of the women reported that near the end of their pregnancies, they took it upon themselves to try to induce labor — mostly by walking, having sex, eating spicy food or stimulating their nipples.

Newborn baby and mom

Walking, sex and spicy food popular ways to bring on labor

Of the 201 women who responded to the survey at a Midwestern hospital, 102, or 50.7 percent, used these or other unprescribed methods to try to bring on labor. Other techniques they tried included exercise, laxative use, acupuncture, masturbation and herbal supplementation.

Most women reported that their family and friends were the most common sources of information about the potential for such methods to induce labor.

Fewer than half of the women who used these methods talked about it with a doctor. Women who tried these techniques tended to be younger, having their first baby, and were more than 39 weeks pregnant.

How labor begins still a mystery

Though the exact mechanism of labor initiation remains unknown, it appears that the process begins when certain hormones are produced by the fetus.

“So despite all of these women trying to go into labor and end their pregnancies, it winds up mostly being something moms have no control over,” says Jonathan Schaffir, associate professor of obstetrics and gynecology at Ohio State University and lead author of the study.

“Obstetricians and midwives may want to offer some additional reassurance to make patients feel like they don’t need to pursue these other techniques.”

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spicy crabs sichuan foodThe labor induction survey

The researchers distributed questionnaires over a four-month period in 2008 to women who were still hospitalized after giving birth. Eligible respondents were women over 18 years old who had completed at least 37 weeks of pregnancy and had healthy babies that did not require intensive care.



Schaffir drew on a study he published almost a decade ago in which he collected a variety of methods that women believed might be successful at inducing labor. Ten of the 11 methods he asked women about in this current study were among those reported in the previous survey.

Methods listed in the questionnaire included walking, exercise, sexual intercourse, nipple stimulation, masturbation, use of laxatives, use of enemas, ingestion of spicy food, ingestion of herbal preparations, acupuncture and starvation.

The researchers asked the women to report which of these methods, if any, they had tried during the seven days before giving birth — with the express purpose of trying to trigger labor.

The survey also collected general demographic data and asked the women where they learned about these methods and whether they had discussed the techniques with a doctor.

Nearly half of the women — a total of 99 — did not use any unprescribed methods to initiate labor.

Among the 102 who did, 87 tried walking, 46 reported engaging in sexual intercourse, 22 ate spicy food and 15 performed nipple stimulation. Some women tried more than one method.

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Starvation and enemas were not used at all among these women. Four women exercised, five used a laxative, two received acupuncture, one tried masturbation and one reported taking an herbal supplement.

Women request non-medical labor induction methods

Schaffir does not raise these issues with his patients, but he says that patients often bring up their ideas in conversations with him. Among the theories he has heard or read about in existing literature on the subject: Sex can ripen the cervix or lead to uterine contractions. Spicy food and laxatives create intestinal activity that could give the uterus a nudge.

Some research has suggested that castor oil as a laxative might indeed help labor start more quickly, but it has drawbacks, including diarrhea and the risk of dehydration for the mother, and increased potential for fetal bowel movements as well.

Exercise was another fairly common belief among the women. “While it’s important to maintain some level of physical activity throughout pregnancy, an otherwise sedentary woman might run into trouble if she decides to start an exercise regimen at the very end,” Schaffir says.

Schaffir doesn’t put much faith in folkloric suggestions, although he says that certain recommendations — such as having sex or taking castor oil — might be biologically plausible to some degree.

“But dosages and safety issues haven’t been worked out to the point where we can safely recommend any folk remedy,” he says. “Such recommendations often have little scientific merit, and some are at odds with what is known to be beneficial for the fetus.”

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The one method known to produce a physiological effect related to labor is nipple stimulation, Schaffir noted. This leads to the release of the hormone oxytocin, which can cause uterine contractions.

“These contractions can be hard to control, and there’s some potential downside in causing too many contractions,” says Schaffir. “It’s just not something I recommend because there is no established safe protocol.”

Younger women more often try DIY induction

The average age of the women trying unprescribed methods was 27.3 years, compared to 30.1 years of age among women who let nature take its course. The study population was mostly white (62.2 percent) or African American (22.9 percent), and no difference in whether the women tried these techniques could be attributed to their race. In general, country of origin and education levels were similar in both groups of women.

Survey respondents reported that their sources of information about trying to trigger labor came from family (41 women), friends (37), physicians (26), the Internet (11), other media (nine) or nurses (six). Forty-six of the women who used one of these methods – fewer than half – told their physicians that they had tried to induce labor on their own.

“Regardless of whether these techniques are harmful or indicated, I think it’s good for caretakers to know that their patients are trying to do things to make their pregnancy end sooner,” Schaffir says.

Above all, he suggests leaving labor to the expert with millions of years’ experience. “For healthy pregnancies, Mother Nature is the best obstetrician,”





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