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DHA — Omega-3 in the first trimester | Pregnancy Power Hour
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Nutrition · trimester 1 · Fatty Acid

DHA — Omega-3 in the first trimester

RDI: Pregnancy: 200-300 mg DHA/day (ACOG)

In the first trimester, DHA — an essential omega-3 fatty acid — is foundational for the critical early neural and visual development of your baby.

2 min read

Quick answer

In the first trimester, DHA — an essential omega-3 fatty acid — is foundational for the critical early neural and visual development of your baby.

During the first trimester, DHA, an essential omega-3 fatty acid, plays a foundational role in the crucial early development of your baby's brain and retina. This is a period of incredible growth, where the very blueprint for your baby's nervous system is being laid. Evidence shows that DHA is the most abundant omega-3 in these vital areas, making its presence essential from these earliest weeks to support this intricate process. Focusing on adequate DHA intake now can contribute to a calm and clear foundation for your pregnancy journey.

Embracing a food-first approach is a wonderful way to ensure you're getting this important nutrient. Excellent sources of DHA include low-mercury fatty fish such as salmon, sardines, and anchovies. You might also find DHA-fortified eggs as a convenient option. For those seeking plant-based alternatives, algae-based DHA offers the same essential fatty acid without concerns about fish-source contamination. Making informed food choices during this time, alongside considering your intake of other key nutrients like Carbohydrates in the first trimester, helps create a robust nutritional environment for your baby's development.

Many prenatal vitamins are now formulated to include DHA, typically providing the recommended 200-300 mg per day. It’s a practical step to check the label of your current prenatal vitamin to understand your intake. Beyond DHA, EPA, another major omega-3, plays a supporting role; a reasonable target for total EPA+DHA is around 500 mg per day. Research, including a Cochrane review, suggests that adequate omega-3 supplementation may even reduce the risk of early preterm birth, specifically before 34 weeks, offering another layer of confidence in prioritizing this nutrient. As your pregnancy progresses and your nutritional needs evolve, understanding these foundational elements helps you make informed choices, much like considering how your focus on Carbohydrates in the second trimester might shift.

When considering supplements, it's helpful to be aware of quality. Organizations like Clean Label Project and Consumer Lab have highlighted that some fish oil brands can be susceptible to oxidation and contamination. Opting for third-party tested supplements can offer peace of mind, ensuring you're getting a high-quality product. Remember, integrating DHA into your routine is about supporting your body and your baby's development with evidence-based choices. This collaborative approach to your wellness, much like considering your Fiber in the first trimester intake, empowers you to feel confident in your decisions. As always, your care provider is your best resource for personalized guidance regarding your specific situation and any supplementation plans.

Keep reading

  • RelatedDHA — Omega-3 in the second trimesterThe second trimester marks a period of rapid fetal brain development, making DHA — a crucial omega-3 fatty acid — especially vital for neural and visual growth.
  • RelatedDHA — Omega-3 in the third trimesterThe third trimester is a pivotal time for DHA accumulation in your baby's developing brain and retina, making informed intake especially supportive.
  • RelatedSalmon in the first trimesterSalmon in the first trimester offers essential omega-3s for early fetal development, providing a nutrient-dense option that supports both you and your baby's foundational growth.
  • RelatedCholine in the first trimesterIn the first trimester, choline plays a vital, often-overlooked role in supporting your baby's neural tube development and laying the foundation for cognitive function.

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Common questions

Why is DHA important in early pregnancy?+

It's crucial for the foundational development of your baby's brain and retina, supporting early neural and visual system formation.

What are good food sources of DHA?+

Fatty fish like salmon and sardines, and DHA-fortified eggs are excellent choices. Algae-based options are also available.

How much DHA is generally recommended during pregnancy?+

Many guidelines suggest around 200-300 mg of DHA per day for pregnant individuals.

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.

Related
Omega-6 Fatty Acids in the first trimester
In the first trimester, rebalancing your Omega-6 fatty acid intake is key, particularly by addressing pre-pregnancy dietary patterns that often lead to an imbalanced ratio with Omega-3.
  • RelatedShould I take fish oil in pregnancy?Fish oil, or its DHA component, is beneficial for fetal brain and eye development, and can be obtained through diet or carefully selected supplements.