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Heartburn at 31 Weeks Pregnant | Pregnancy Power Hour
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Week 31 symptom · mild

Heartburn at 31 Weeks Pregnant

At 31 weeks, heartburn often intensifies as your growing uterus presses upward, making symptoms particularly noticeable, especially when lying down.

2 min read

Quick answer

At 31 weeks, heartburn often intensifies as your growing uterus presses upward, making symptoms particularly noticeable, especially when lying down.

Also called: pregnancy acid reflux

At 31 weeks pregnant, the sensation of heartburn can become a more prominent part of your daily experience, often intensifying as your uterus expands further and places increasing pressure on your stomach. Many parents-to-be find that this common third-trimester symptom, sometimes called 'pregnancy acid reflux,' can be particularly bothersome now. It's a gentle reminder of the remarkable changes happening within your body as your baby continues to grow and your internal organs shift to accommodate. Understanding these shifts helps bring clarity, much like learning about changes you might notice around Pregnancy Varicose Vein Symptoms at 29 Weeks Pregnant.

The physiological reason for this discomfort is twofold. Firstly, the hormone progesterone, which is essential for maintaining your pregnancy, can cause the lower esophageal sphincter—the muscle that separates your esophagus from your stomach—to relax. This relaxation allows stomach acid to flow back up, creating that familiar burning sensation. Secondly, at 31 weeks, your uterus has grown significantly, pushing upwards and exerting physical pressure on your stomach. This combination of hormonal influence and mechanical pressure makes heartburn a very real and often uncomfortable reality, especially when you recline or lie flat.

Navigating heartburn at this stage is about exploring options that bring you calm and comfort. One approach might be to adjust your eating patterns, opting for smaller, more frequent meals rather than large ones. This can help reduce the volume of food in your stomach at any given time, potentially lessening the pressure. For those seeking over-the-counter relief, calcium carbonate antacids, such as Tums or Rolaids, are often recommended as a first-line option and are considered safe across all trimesters. It’s about making informed decisions that feel right for you, in collaboration with your care provider.

If these initial steps don't offer sufficient comfort, you get to decide what further options to explore. Some individuals find relief with medications like famotidine (Pepcid), which is considered safe when antacids alone aren't enough. For more persistent symptoms, omeprazole and other proton pump inhibitors (PPIs) are generally considered safe in the second and third trimesters. Your provider is your best resource for your specific situation, helping you weigh these options. Exploring various options for comfort, whether for heartburn or other physical sensations like those discussed in Pregnancy Varicose Vein Symptoms at 30 Weeks Pregnant, empowers you to make informed decisions for your well-being. Just as your body is adapting to other late-pregnancy changes, like the potential for Pregnancy Varicose Vein Symptoms at 28 Weeks Pregnant, managing heartburn is another aspect of navigating this phase with clarity and confidence.

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Common questions

Why is heartburn so common in the third trimester?+

It's due to progesterone relaxing a key muscle and your growing uterus pressing on your stomach, which intensifies as you reach 31 weeks.

Are antacids safe during pregnancy?+

Calcium carbonate antacids are generally considered safe across all trimesters as a first-line option for managing heartburn symptoms.

What if antacids don't work for my heartburn?+

You can discuss options like famotidine or omeprazole with your care provider, as they are often considered safe when antacids aren't enough.

Brittany Nance

“Pregnancy is under-supported at every week. This is the kind of clear, calm guidance I give my one-on-one clients — and the questions worth taking back to your provider.”

Brittany Nance · Pregnancy Wellness Consultant · full-spectrum doula

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Written by Brittany Nance, Pregnancy Wellness Consultant· BADT Full Spectrum Doula · Founder, Pregnancy Power Hour
Last reviewed July 1, 2026

This is evidence-informed education from a birth-doula perspective, not medical advice. Always discuss your individual situation with your prenatal care provider.

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