Why Is Omega-3 So Important During Pregnancy?

Javier Colomer 6 min. of reading For Pregnancy Leave a comment

When we talk about nutrition during pregnancy, we usually think immediately of folic acid or iron. However, there is one nutrient that often stays in the background and is, quite literally, a fundamental building block for life: Omega-3.

It is important to understand that Omega-3 (especially DHA) is not just an “extra” or an optional supplement. It is a basic structural component. Without it, the construction of the fetal nervous system could not be carried out optimally.

During pregnancy, the mother’s body prioritizes sending these fatty acids to the baby, so ensuring an adequate intake is vital both for the baby’s development and for the mother’s well-being.

Index

1 EPA and DHA: The Two Pillars of Omega-3 for Pregnant Women
2 Benefits of DHA for Fetal Development
3 Benefits for the Mother
4 Which Pregnancy-Safe Foods Provide Omega-3?
5 Omega-3 Supplements for Pregnant Women
6 Are There Risks Associated with Omega-3 Consumption During Pregnancy?

EPA and DHA: The Two Pillars of Omega-3 for Pregnant Women

Not all Omega-3s are the same. Although we usually see the abbreviations together on labels, EPA and DHA perform different and complementary functions:

DHA (Docosahexaenoic Acid): It is the “architect.” It plays the leading role in structural development, focusing on the formation of the brain and retina.
EPA (Eicosapentaenoic Acid): It is the “balance ally.” It helps maintain a healthy cardiovascular system and plays a crucial role in the mother’s mood by helping regulate inflammatory processes.

Benefits of DHA for Fetal Development

DHA is probably the most critical fatty acid during the third trimester of pregnancy and the first months of life, when brain growth is exponential.

The Brain

Did you know that 60% of the human brain is made up of fat? Of that percentage, a large part is DHA. This fatty acid is essential for the formation of neuron membranes and facilitates communication between them (synapses). An adequate intake of DHA is associated with better cognitive development and executive functions later in life.

Eye Health

DHA is not only found in the brain; it is also highly concentrated in the retina. It is a key component for the baby to develop optimal visual acuity at birth and during the first months of life, allowing them to begin discovering the world clearly.

Benefits for the Mother

Omega-3 not only supports the baby; it is also a health safeguard for pregnant women. Scientific evidence suggests that optimal levels of these fatty acids help to:

Prevent preterm birth: Helps prolong pregnancy to full term.
Reduce the risk of preeclampsia: Thanks to its support for vascular health.
Maternal mental health: Omega-3 plays a key role in preventing postpartum depression, helping maintain emotional balance after the major hormonal changes following childbirth.

Which Pregnancy-Safe Foods Provide Omega-3?

During pregnancy, we must be selective about Omega-3 sources to avoid heavy metals such as mercury. We can divide sources into two groups:

Animal-Based Sources:

Salmon: Excellent source of DHA and EPA, essential for the baby’s brain and visual development. It should always be fully cooked; avoid sushi, refrigerated smoked fish, and raw fish during pregnancy.
Sardines and anchovies: Highly recommended due to their high omega-3 content and low mercury accumulation risk, as they are small fish.
Herring and small mackerel: Provide large amounts of DHA and EPA. It is important to distinguish them from larger species with higher mercury levels; always prioritize small mackerel and consume them fully cooked.
Trout and anchovies: Safe and nutritious alternatives, providing healthy fats and high-quality protein.
Omega-3 enriched eggs: A practical option to increase DHA intake in women who consume little fish.

Plant-Based Sources (mainly provide ALA, which the body converts into limited amounts of DHA and EPA):

Walnuts: One of the best healthy snacks during pregnancy, rich in ALA, minerals, and antioxidants.
Chia and flax seeds: Very interesting due to their omega-3 and fiber content. Ideally, they should be consumed ground or soaked to improve nutrient absorption.
Flaxseed oil: A concentrated source of ALA. It should be used raw and stored refrigerated to prevent oxidation.
Hemp seeds: Provide healthy fats, plant-based proteins, and beneficial minerals during pregnancy.
Soy and edamame: Contain small amounts of omega-3 and can complement a balanced diet.

Omega-3 Supplements for Pregnant Women

In many cases, due to nausea or dietary restrictions, it is difficult to achieve the necessary DHA intake through diet alone. Therefore, supplementation becomes a safe and effective tool.

When choosing an omega-3 product, it is recommended that it meets the following criteria:

Maximum guaranteed absorption: In natural triglyceride form, because the body recognizes and absorbs it much more effectively than other synthetic versions.
Optimal concentration: Each daily dose should ensure a real intake of EPA and DHA, the key amounts needed to obtain their benefits.
IFOS™ quality seal: Certified by IFOS, ensuring maximum quality, safety, and transparency, free from toxins or unwanted substances.

When and How to Take Omega-3 During Pregnancy

The recommended dose for a pregnant woman is usually around 200–300 mg of additional DHA on top of the recommended daily intake for adults.

When should it be taken? The best time is with a main meal containing some fat (such as a drizzle of olive oil or avocado), as this greatly facilitates absorption.
For how long? It is recommended throughout pregnancy, becoming especially important during the last trimester, and continuing during breastfeeding.

Are There Risks Associated with Omega-3 Consumption During Pregnancy?

In general, Omega-3 is very safe. However, there are two points to keep in mind:

Fish source: The main risk is not Omega-3 itself, but the mercury contained in large fish (bluefin tuna, swordfish). That is why high-quality filtered supplements are a very safe option.
Anticoagulant effect: In very high doses, Omega-3 may have a slight anticoagulant effect. Therefore, if you have a scheduled cesarean section or are close to your due date, it is essential to consult your gynecologist to adjust the dosage.

As always, supplementation should support a balanced diet and be supervised by a healthcare professional.

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