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Healthy Pregnant Women Fart: Doctors on Why Pregnancy Gas Is Good

It's nothing to worry about. She's farting for two.

Scientists with unusual research priorities have demonstrated that couples who fart together tend to stay together. That’s good news. The better, stinkier news for expecting parents is that pregnancy farts are real — and no, you can’t blame the baby kicking. Along with weird cravings, constipation, and a few suitcases’ worths of prenatal vitamins, pregnant women get gas. Thanks to hormonal and physiological changes, women wind up farting for two. So if you’re left wondering “why am I so gassy?” let us reassure you that gas during pregnancy is common, healthy, and nothing to be ashamed of.

“A number of factors contribute to flatulence during pregnancy,”  Dr. Michael Cackovic, an obstetrician-gynecologist at The Ohio State University, explains. “Increased progesterone concentration plays a major role in decreasing the activity of colonic smooth muscle.”

The average person farts up to 20 times a day, passing anywhere from 500 to 1500 milliliters of gas, but for women, this number inflates when they get pregnant because their bodies produce more progesterone. Progesterone causes the intestine muscles to relax to make room for a growing baby. However, these relaxed muscles make it much easier for farts to slip out. As the fetus grows it puts extra pressure on the abdomen. This contributes to pregnant women not just farting more, but farting more often on accident in inopportune places like at work, with the in-laws, or during an exam from an obstetrician.

Relaxation also makes it harder to push waste through the GI tract, slowing digestion. Prenatal vitamins contribute to further constipation creating a perfect gas storm. Bloating, burping, and farting inevitably follow.  

“Pregnant women often complain of abdominal bloating and constipation likely caused by hormonal changes that affect small bowel and colonic motility,” Cackovic says. “Additionally, the pregnant uterus can cause a mechanical slowing of bowel transit and this certainly could worsen as pregnancy advances into the third trimester.”

Finally, pregnant women’s diets can further contribute to excessive pregnancy farts, but it’s not necessarily strange cravings for pickles and ice cream that do it. Rather, healthy dietary changes brought on by having a baby, such as eating more fruits and vegetables, can increase gas — especially if women were eating carelessly prior to pregnancy.

Pregnancy gas is not, in and of itself, a bad thing. But, for pregnant women, a build-up of gas can become harmful. If pregnant women are experiencing abdominal pain or constipation for over a week, they should contact their doctors. But otherwise, excessive gas passing is nothing to worry about and poses no danger to a growing baby. That said, moms-to-be can reduce some of their gas pains or discomforts by drinking plenty of water, getting enough exercise and sleep, and limiting dairy, pork, and processed foods, which can make flatulence worse.

As powerful and plentiful as pregnancy farts are, they’re ultimately a symptom that the pregnancy is progressing in a healthy way. So they should be welcomed with plugged noses and open arms. Small adjustments might offer relief, but nothing helps more than having a supportive partner farting by their side, Cackovic adds.

“Reassurance over the temporary inconvenience and support are the keys to getting through this.”