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Carbohydrates in the third trimester | Pregnancy Power Hour
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Nutrition · trimester 3 · Macronutrient

Carbohydrates in the third trimester

RDI: Pregnancy RDA: 175g/day (IOM)

In the third trimester, focusing on complex carbohydrates is especially beneficial for sustained energy and blood sugar management, particularly if you're navigating gestational diabetes.

2 min read

Quick answer

In the third trimester, focusing on complex carbohydrates is especially beneficial for sustained energy and blood sugar management, particularly if you're navigating gestational diabetes.

As you navigate the final months of pregnancy, your body's demand for carbohydrates remains significant, with a particular emphasis on how these macronutrients support sustained energy and, crucially, blood sugar management, especially if you're addressing gestational diabetes. This period is marked by your baby's rapid growth, which requires a consistent supply of glucose. Your body is working hard, and maintaining stable energy levels can make a real difference in your day-to-day comfort.

Complex carbohydrates, such as oats, brown rice, sweet potatoes, beans, and other whole grains, are your allies during this time. They offer a steady release of glucose, which is vital for providing consistent energy for both you and your baby's developing brain. Unlike refined sugars, which can cause quick spikes and drops in blood sugar, complex carbohydrates are absorbed more slowly, helping to keep your energy stable. This steady supply is particularly important if you're managing gestational diabetes, where careful attention to the glycemic index and load of foods can help maintain healthy blood sugar levels. Many people find that incorporating these types of foods helps them feel more grounded and less prone to energy dips.

It's worth noting that the general recommendation for carbohydrate intake during pregnancy is around 175 grams per day, a slight increase from non-pregnant recommendations, specifically to ensure adequate glucose for fetal brain development. While this is a general guideline, your individual needs may vary, and your care provider is your best resource for personalized advice. We can explore how to integrate these foods in a way that feels supportive and sustainable for you. For broader nutritional insights, you might also find it helpful to explore topics like Vitamin A in the third trimester or Vitamin E in the third trimester to ensure you're considering a full spectrum of nutrients.

While refined sugars in moderation are generally fine, evidence suggests that consuming more than 10% of your daily calories from added sugar can be associated with adverse outcomes. Prioritizing whole, unprocessed carbohydrate sources allows you to benefit from the fiber and other nutrients they provide. Conversely, very low-carb approaches, sometimes referred to as keto-style diets, are not recommended during pregnancy. Animal studies suggest that ketosis could potentially affect fetal neurodevelopment, so maintaining a balanced intake is a gentle, evidence-based approach. Early in pregnancy, many people naturally gravitate towards carbohydrate-rich foods to help with nausea, and that's a normal physiological response. As you progress, the focus shifts to sustained energy and blood sugar balance.

Ultimately, the goal is to make informed decisions that support your well-being and your baby's growth. Understanding how different carbohydrates affect your body can bring a sense of clarity and confidence as you prepare for birth. Remember, your provider is your best resource for your specific situation, especially if you have concerns about gestational diabetes or other health conditions. We can work together to explore options that align with your preferences and health goals.

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Common questions

How much carbohydrate is generally recommended during pregnancy?+

During pregnancy, the recommended carbohydrate intake is around 175 grams per day to support your baby's brain development.

Are very low-carb diets suitable during pregnancy?+

Very low-carb diets, like keto, are not recommended in pregnancy due to potential effects of ketosis on fetal neurodevelopment, as suggested by animal studies.

Why are complex carbohydrates often highlighted?+

Complex carbohydrates offer steady glucose release and beneficial fiber, which can be helpful for managing blood sugar levels and promoting digestive comfort.

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.

Keep reading

  • RelatedCarbohydrates in the second trimesterIn the second trimester, carbohydrates become even more crucial for meeting your body's increasing energy demands and providing steady glucose for fetal development.
  • RelatedCarbohydrates in the first trimesterIn the first trimester, carbohydrates are often the most tolerable macronutrient amidst nausea, providing essential energy for both you and your baby's early development.
  • 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.
  • RelatedOatmeal in the third trimesterIn the third trimester, oatmeal offers sustained energy, crucial fiber for digestion, and essential nutrients, making it a gentle and supportive staple.
  • RelatedProtein in the third trimesterIn the third trimester, protein intake becomes particularly crucial to support your baby's rapid growth and prepare your body for colostrum production.
  • RelatedBrown Rice in the third trimesterIncorporating brown rice into your third-trimester diet offers valuable nutrients, but varying your grain choices is a practical approach due to potential arsenic concerns.