# Pregnancy Constipation in the first trimester

Source: https://www.pregnancypowerhour.com/trimester-conditions/constipation-in-first-trimester
Last updated: 2026-07-15

> In the first trimester, constipation often intensifies due to rising progesterone and can be exacerbated by early iron supplementation in your prenatal.

Experiencing slow digestion or constipation in early pregnancy is incredibly common, and you are certainly not alone. While constipation can be a companion throughout pregnancy, the first trimester has some unique factors at play.

## Why it shows up this trimester

The primary driver for first-trimester constipation is the significant surge in progesterone. This vital hormone, crucial for maintaining your pregnancy, has a relaxing effect on smooth muscles throughout your body – and that includes your digestive tract. This relaxation means things simply move more slowly, giving your body more time to absorb water from your stool, making it harder to pass.

Another common contributor during this window is the iron content in many prenatal vitamins. While essential for supporting your growing blood volume and your baby's development, iron supplements can be notorious for slowing down digestion even further. If you're also experiencing nausea or food aversions, it can be challenging to consume enough fiber and fluids, which can compound the issue.

## What it tends to feel like now

In the first trimester, you might notice infrequent bowel movements, stools that are harder or more difficult to pass, and a general feeling of bloating or abdominal discomfort. Some people describe it as a persistent heaviness or pressure. It's usually a mild, ongoing annoyance rather than sharp pain, but it can certainly impact your overall comfort and energy levels during a time when you're already navigating significant changes.

## What helps in this window

Supporting your digestive system in early pregnancy can make a real difference. One of the most evidence-based approaches is **hydration**. Aim for plenty of water throughout the day, and consider warm liquids like herbal tea or clear broths. **Dietary fiber** is another key player. Incorporating more fruits, vegetables, whole grains, and legumes can help add bulk and softness to your stool. You get to decide what feels good for your body, especially if nausea is present. Some people find that gentle, consistent movement, like a daily walk, can also encourage gut motility.

For some, a magnesium supplement (always discuss with your provider first) can offer gentle support. Remember, the goal is not to "force" a bowel movement, but to create an environment where your body can function with more ease. You have options, and exploring what works best for you is part of building your confident pregnancy experience.

## Working with your care team

Your prenatal care provider is your best resource for your specific situation. Discuss any persistent or worsening constipation with them, especially if you're considering changes to your prenatal vitamin or adding any supplements. They can help you explore different iron formulations or other gentle interventions that are safe and appropriate for your pregnancy. Having an open conversation ensures you're making informed decisions about your well-being.

Grab the free first-trimester guide — link in bio