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Pregnancy Constipation in the third trimester | Pregnancy Power Hour
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Condition · third trimester · mild

Pregnancy Constipation in the third trimester

In your third trimester, slow digestion can feel more pronounced as your growing baby places extra pressure on your colon, making bowel movements less frequent and sometimes uncomfortable.

2 min read

Quick answer

In your third trimester, slow digestion can feel more pronounced as your growing baby places extra pressure on your colon, making bowel movements less frequent and sometimes uncomfortable.

On this page
  1. Why it shows up this trimester
  2. What it tends to feel like now
  3. What helps in this window
  4. Working with your care team

As you navigate your third trimester, you might notice that slow digestion, a common companion throughout pregnancy, feels a bit more pronounced now. It's a mild but often persistent symptom that can add to the general discomfort of late pregnancy. Understanding why it's happening and what gentle approaches might offer relief can bring more clarity and ease to this stage.

Why it shows up this trimester

Progesterone, the hormone that helps maintain your pregnancy, continues to relax smooth muscles throughout your body, including those in your digestive tract. This relaxation naturally slows down the movement of food through your intestines. However, a significant factor unique to this stage is the sheer size of your growing uterus and baby. As your little one expands, they can begin to place direct pressure on your colon and rectum, making it harder for stool to move through.

Many parents also find that their physical activity naturally decreases in the third trimester, which can further slow down gut motility. If your care provider has recommended iron supplements, which are often prescribed in later pregnancy, these can also contribute to constipation, as iron can be binding for some individuals.

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What it tends to feel like now

You might experience a more persistent feeling of fullness or bloating, even when you haven't eaten much. Straining during bowel movements, or noticing harder, smaller stools, can also be common. Some individuals report less frequent bowel movements than their usual pattern, along with general discomfort or a feeling of incompleteness after using the restroom. This can contribute to a feeling of sluggishness overall.

What helps in this window

Staying well-hydrated is always key, but it's especially important now. Aim for consistent sips of water throughout the day, and consider incorporating hydrating foods like fruits and broths. Incorporating fiber-rich foods such as whole grains, leafy greens, and legumes can offer gentle support. These foods help to soften stool and add bulk, making it easier to pass.

Gentle, consistent movement, like a daily walk or prenatal yoga (always with your provider's approval), can encourage your digestive system to keep things moving. Some people find that using a small footstool to elevate their knees while on the toilet can create a more optimal angle for bowel movements, easing strain. Allowing yourself ample, unhurried time for bowel movements can also be helpful.

Working with your care team

It’s always a good idea to discuss any persistent or worsening digestive discomfort with your care provider. They are your best resource for understanding your specific situation and can help rule out any other concerns. They can also review any supplements you're taking, like iron, to see if adjustments might be helpful, or suggest specific over-the-counter options if needed. Remember, you get to decide what feels right for your body. Exploring these options collaboratively with your care team can bring more calm and clarity to your third trimester.

Common questions

Can third-trimester constipation affect labor?+

While uncomfortable, mild constipation in the third trimester is unlikely to directly impact labor. Focusing on gentle relief now can help you feel more comfortable as you approach your due date. Your care provider can offer personalized guidance.

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 15, 2026

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

On this page

  1. Why it shows up this trimester
  2. What it tends to feel like now
  3. What helps in this window
  4. Working with your care team

Keep reading

  • RelatedPregnancy Constipation in PregnancyPregnancy constipation is a common experience for many, often starting early and sometimes returning later, reflecting your body's adaptations.
  • RelatedFiber in the third trimesterIn the third trimester, adequate fiber intake becomes especially crucial to gently support digestion and manage constipation, often exacerbated by the growing uterus.
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  • RelatedPregnancy Gas and Bloating in PregnancyPregnancy gas and bloating, a common and mild symptom affecting most pregnancies, often begins early due to progesterone's effect on digestion and can be eased with dietary adjustments, hydration, gentle movement, and provider-approved options.
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