Can You Eat Fish During Pregnancy?
Omega-3 benefits, mercury risks, and a clear guide to the safest and most nutritious fish choices.
Fish is an excellent source of omega-3 fatty acids (DHA and EPA), protein, and vitamin D — all critical for fetal brain and eye development. The FDA and EPA recommend pregnant women eat 2–3 servings (225–340 g) of low-mercury fish per week. Avoid high-mercury species like shark, swordfish, king mackerel, and tilefish.
🐟 Why Fish Is Important During Pregnancy
Fish is one of the best dietary sources of nutrients essential for your baby's development:
- DHA (omega-3): Critical for fetal brain and retina development. Studies show that adequate DHA intake during pregnancy is linked to better cognitive outcomes in children.
- Protein: High-quality, easily digestible protein for tissue growth.
- Vitamin D: Important for calcium absorption and bone development.
- Iodine: Essential for thyroid function and fetal neurological development.
- Selenium: Supports immune function and thyroid metabolism.
The FDA recommends 2–3 servings (225–340 g total) of low-mercury fish per week during pregnancy. Not eating fish at all may actually deprive your baby of important nutrients.
✅ Best Fish Choices (Low Mercury, High Omega-3)
| Fish | Mercury level | Omega-3 content | Recommendation |
|---|---|---|---|
| Salmon (wild) | Very low | Very high | Best choice — 2–3x/week |
| Sardines | Very low | Very high | Excellent choice |
| Anchovies | Very low | High | Excellent choice |
| Herring | Very low | Very high | Excellent choice |
| Trout (freshwater) | Low | High | Good choice |
| Cod | Low | Moderate | Good choice |
| Tilapia | Low | Low | Good choice (less omega-3) |
| Shrimp | Very low | Moderate | Good choice |
❌ Fish to Avoid (High Mercury)
Mercury is a neurotoxin that can harm your baby's developing brain and nervous system. The following fish have the highest mercury levels and should be completely avoided during pregnancy:
| Fish to avoid | Reason |
|---|---|
| Shark | Very high mercury |
| Swordfish | Very high mercury |
| King mackerel | Very high mercury |
| Tilefish (Gulf of Mexico) | Very high mercury |
| Bigeye tuna | High mercury |
| Marlin | Very high mercury |
| Orange roughy | High mercury |
Canned tuna: Light canned tuna is lower in mercury (1 serving/week is safe). Albacore (white) tuna has more mercury — limit to 1 serving/week.
📋 Safe Fish Preparation Tips
- Cook fish to an internal temperature of 63°C (145°F) — the flesh should be opaque and flake easily.
- Avoid raw fish — no sashimi, ceviche, or raw oysters.
- Avoid cold-smoked fish unless it is heated until steaming hot.
- If you eat locally caught fish, check local advisories for mercury and pollution levels.
- If you don't eat fish, consider an omega-3 supplement (purified fish oil or algae-based DHA) — consult your doctor for dosage.
- Vary the types of fish you eat rather than eating the same species repeatedly.
❓ FAQ
How much fish should I eat per week during pregnancy?
The FDA recommends 2–3 servings (225–340 g total) of low-mercury fish per week. This provides optimal omega-3 intake for your baby's brain development.
Can I eat canned tuna while pregnant?
Yes, light canned tuna is lower in mercury and safe to eat once a week. Limit albacore (white) tuna to one serving per week due to its higher mercury content.
Is salmon the best fish to eat during pregnancy?
Wild salmon is widely considered one of the best choices — it is very low in mercury and extremely high in DHA omega-3 fatty acids. Other excellent choices include sardines, herring, and anchovies.
What if I don't like fish — how do I get omega-3?
If you don't eat fish, you can take a purified fish oil supplement or an algae-based DHA supplement. Walnuts, chia seeds, and flaxseeds provide ALA omega-3, but conversion to DHA is limited. Consult your doctor for supplement recommendations.
Sources
- FDA/EPA — Advice about Eating Fish for Pregnant Women (2021)
- ACOG — Nutrition During Pregnancy: Omega-3 fatty acids
- WHO — Healthy diet during pregnancy
- NHS — Fish and shellfish in pregnancy