Is tilapia safe during pregnancy?

Yes, if it is cooked, and its mercury is low. FDA monitoring measured an average of 0.013 ppm mercury in 32 tilapia samples, with the highest at 0.084 ppm, and those samples date from 1991 to 2008. The FDA and EPA advise people who are pregnant to eat 8 to 12 ounces of lower-mercury seafood a week and list tilapia as a Best Choice. We found no study that tested tilapia itself in pregnant women. Its weak point is nutrition: it carries much less omega-3 fat than salmon or trout, and omega-3 is what the strongest pregnancy evidence is about.

Established. Tilapia is low in mercury. That rests on FDA measurement data and on a 2025 review of 18 studies of farmed fish from 7 countries, where tilapia was among the most studied species and mercury levels were low. These are measurements of the fish. They are not studies of pregnant women.

What the trials found

Omega-3 fats and preterm birth, the one A-level finding

A Cochrane review of 70 randomized trials in 19,927 pregnant women tested omega-3 fats given as supplements or as foods such as fish. Preterm birth before 37 weeks fell from 13.4 percent to 11.9 percent (RR 0.89, 95% CI 0.81 to 0.97), and early preterm birth before 34 weeks fell from 4.6 percent to 2.7 percent (RR 0.58, 95% CI 0.44 to 0.77), both on high-quality evidence. Most of those trials gave capsules, and the benefit carries over to tilapia only weakly. A laboratory analysis of 30 fish bought in the United States found farmed tilapia much lower in omega-3 fats than salmon or trout, with a very high ratio of long-chain omega-6 to omega-3. That analysis measured composition and no health outcome.

Myth. A popular claim says tilapia is worse for you than bacon. The fatty acid analysis above measured fats in the fillet. It did not measure anything in people who ate it, and its abstract does not compare tilapia with bacon.

The nearest food trial: lean white fish

No randomized trial has fed tilapia to pregnant women. The closest is a Norwegian trial of cod, a lean white fish. In 133 women, 14 oz (400 g) of cod a week for 16 weeks did not change overall infant development scores (P = 0.633). It did lower socio-emotional problem scores, to 20.9 and 20.5 against 26.1 and 26.8 at 3 and 6 months (P = 0.020). This is a small trial of a different fish.

Seafood and child development, in cohorts

A 2025 systematic review of 40 articles, almost all cohort studies, linked more seafood in pregnancy with better social, emotional and behavioral development in children, with certainty rated very low to moderate because randomized trials were missing. Across 32 US cohorts, children of women who ate any fish in pregnancy had 16 percent lower odds of an autism diagnosis than children of women who ate none (OR 0.84, 95% CI 0.77 to 0.92), with fish intake self-reported and all species pooled. These are associations, and neither study analyzed tilapia on its own.

Who should be careful

Mercury is the usual worry with fish in pregnancy, and for tilapia the data are reassuring. A review of 44 publications on 106,237 mothers and children, using the method behind the US Dietary Guidelines, found no net harm to child neurodevelopment at the highest seafood intakes, despite higher mercury exposure. That review is observational and its authors could not reach conclusions for single species. In the cod trial, 137 women eating 14 oz (400 g) a week for 16 weeks ended with a median hair mercury of 554 mcg/kg against 485 mcg/kg on their usual diet, a difference that did not reach significance (p = 0.186).

The real hazard is raw or undercooked fish. In fresh tilapia from one market in Riyadh, 12 percent of samples carried an environmental type and 4 percent a clinical type of Vibrio vulnificus, and the authors tie the risk to raw or undercooked fish. The abstract does not give how many fish were tested. A Japanese case report with a review of the literature linked Edwardsiella tarda infections in mothers and newborns to raw fish and advised pregnant women to avoid high-risk raw fish, freshwater fish included. Tilapia is not named in that report, which describes one newborn plus earlier cases.

Not for everyone. If you are pregnant, eat tilapia cooked through. The FDA advises cooking most seafood to an internal temperature of 145°F. Tilapia sushi, ceviche or rare fillets are the form to skip.

What expert bodies say

The US FDA and EPA advise those who are pregnant or breastfeeding to eat between 8 and 12 ounces a week of a variety of seafood from lower-mercury choices, and put tilapia on their Best Choices list. The FDA advises cooking most seafood to an internal temperature of 145°F. We found no statement on tilapia from ACOG or from the European Food Safety Authority.

How we searched

What would change this answer

• A cohort that reports tilapia intake on its own against pregnancy or child outcomes, instead of folding it into total fish or seafood.
• Fresh mercury monitoring. The FDA tilapia data stop in 2008, and farming has grown since.
• A larger survey of bacteria on retail tilapia, with sample counts, in more than one market.

More on the fish itself, including its protein and its fats: Tilapia.

Sources

1. ev-tlpg-01 · Meta-analysis or systematic review · Cochrane systematic review and meta-analysis of RCTs with GRADE · n = 19,927
   Preterm birth < 37 weeks (13.4% versus 11.9%; risk ratio (RR) 0.89, 95% confidence interval (CI) 0.81 to 0.97; 26 RCTs, 10,304 participants; high-quality evidence) and early preterm birth < 34 weeks (4.6% versus 2.7%; RR 0.58, 95% CI 0.44 to 0.77; 9 RCTs, 5204 participants; high-quality evidence) were both lower in women who received omega-3 LCPUFA compared with no omega-3.
   
   Who: women at low, mixed or high risk of poor pregnancy outcomes; omega-3 LCPUFA supplements or food vs placebo or no omega-3
   Effect: preterm birth <37 wk RR 0.89 (95% CI 0.81 to 0.97; 26 RCTs, 10,304 participants; high quality); early preterm <34 wk RR 0.58 (0.44 to 0.77)
   Certainty: Mostly capsule trials; tilapia not tested and is a poor EPA/DHA source (see ev-tlpg-09), so the benefit transfers weakly.
   Cochrane Database Syst Rev, 2018 · checked 2026-10-07 · we read the abstract
2. ev-tlpg-02 · Observational data · systematic review of cohorts and one RCT, narrative synthesis with GRADE · n = 40 articles
   Evidence suggested relationships between higher seafood consumption and better social-emotional and behavioral development in children and adolescents aged 0-18 y as well as better aggregate scores of development for those <4 y. The certainty of the evidence was very low to moderate due to the lack of RCTs.
   
   Who: pregnant women and their children aged 0 to 18 years; 1 RCT, 24 prospective and 1 retrospective cohort
   Effect: better social-emotional, behavioral and aggregate development scores; GRADE very low to moderate
   Certainty: Observational synthesis, so C. Tilapia not analyzed as a separate fish.
   Adv Nutr, 2025 · checked 2026-10-07 · we read the abstract
3. ev-tlpg-03 · Observational data · systematic review of observational studies (Dietary Guidelines methodology) · n = 106,237 mother-offspring pairs
   No net adverse neurocognitive outcomes were reported among offspring at the highest ranges of seafood intakes despite associated increases in mercury exposures.
   
   Who: healthy pregnant women and offspring in 44 publications
   Effect: no net adverse neurocognitive outcomes at the highest seafood intakes despite higher mercury exposure
   Certainty: Observational; species-level conclusions not possible per authors.
   Prostaglandins Leukot Essent Fatty Acids, 2019 · checked 2026-10-07 · we read the abstract
4. ev-tlpg-04 · Randomized controlled trial(s) · randomized controlled trial, secondary analysis · n = 133
   We found no difference between infants in the intervention and control groups on total ASQ-2 scores (P = 0.633), but a difference on the ASQ:SE scores in favor of the intervention group (20.9 and 20.5 in the intervention group and 26.1 and 26.8 in the control group for 3 and 6 mo, respectively; P = 0.020).
   
   Who: pregnant women at or before 19 weeks in Norway, 200 g cod fillet twice weekly vs habitual diet for 16 weeks
   Effect: ASQ-2 total no difference (P = 0.633); ASQ:SE 20.9 and 20.5 vs 26.1 and 26.8 at 3 and 6 months (P = 0.020)
   Certainty: Cod is the nearest tested analog of tilapia (lean, low mercury); not tilapia itself; small sample. NCT02610959.
   J Nutr, 2021 · checked 2026-10-07 · we read the abstract
5. ev-tlpg-05 · Randomized controlled trial(s) · randomized controlled trial · n = 137
   Post-intervention, the intervention group had median (inter-quartile range) THHg concentrations of 554 (392-805) µg/kg, and the control group 485 (341-740) µg/kg (p = 0.186).
   
   Who: pregnant women in Norway, gestational week 20 to 36, 400 g cod fillets per week vs habitual diet
   Effect: post-intervention hair mercury median 554 vs 485 ug/kg (p = 0.186)
   Certainty: Cod, not tilapia; hair mercury difference not significant.
   Environ Int, 2020 · checked 2026-10-07 · we read the abstract
6. ev-tlpg-06 · Observational data · systematic review of contamination measurement studies · n = 18 studies
   In total, 18 articles are eligible for this review. ... Oreochromis niloticus Tilapia, and Hypophthalmichthys nobilis (synonym of Aristichthys nobilis) Bighead carp have registered the highest frequency. The mercury values found in fish from the production system were low.
   
   Who: 18 articles, 50 farmed fish species, China, Korea, Pakistan, India, Brazil, USA, Poland
   Effect: low mercury in farmed fish overall; no pooled tilapia value in the abstract
   Certainty: Measurement surveys, not health outcomes; level C as observational data.
   Biol Trace Elem Res, 2025 · checked 2026-10-07 · we read the abstract
7. ev-tlpg-07 · Position of an expert body · agency monitoring data · n = 32 samples
   TILAPIA | 0.013 | 0.004 | 0.023 | ND | 0.084 | 32 | FDA 1991-2008
   
   Who: commercial tilapia samples, FDA 1991-2008
   Effect: mean 0.013 ppm, median 0.004, SD 0.023, min ND (<0.01), max 0.084
   Certainty: Data 1991-2008, not updated since.
   US FDA, Mercury Levels in Commercial Fish and Shellfish (1990-2012) · checked 2026-10-07 · we read the section
8. ev-tlpg-08 · Position of an expert body · agency consumer advice · n = —
   Those who are pregnant or breastfeeding consume between 8 and 12 ounces per week of a variety of seafood from choices that are lower in mercury.
   
   Who: people who are pregnant or breastfeeding
   Effect: 8 to 12 oz/week of lower-mercury seafood; tilapia on the Best Choices list
   Certainty: T2, level E. Tilapia in Best Choices confirmed on the same page in two independent fetches.
   US FDA/EPA, Advice about Eating Fish (content current as of 03/05/2024) · checked 2026-10-07 · we read the section
9. ev-tlpg-09 · Laboratory or animal data · food composition analysis by gas chromatography · n = 30 fish samples
   In contrast, tilapia (the fastest growing and most widely farmed fish) and catfish have much lower concentrations of n-3 PUFA, very high ratios of long chain n-6 to long chain n-3 PUFAs, and high saturated fatty acid plus monounsaturated fatty acid to PUFA ratios.
   
   Who: 30 commonly eaten farmed and wild fish from US supermarkets and wholesalers
   Effect: tilapia and catfish: much lower n-3 PUFA, very high long-chain n-6:n-3 ratio vs trout and Atlantic salmon
   Certainty: Composition only, no health outcome; the 'inflammatory' label is the authors' inference. Outside our PubMed snapshot, so the passport is unchecked by machine and the quote is checked by eye only.
   J Am Diet Assoc, 2008 · checked 2026-10-07 · we read the abstract
10. ev-tlpg-10 · Observational data · cohort consortium analysis · n = 3,939
    In adjusted regression models, relative to no fish intake, fish intake during pregnancy was associated with reduced odds of autism diagnosis (odds ratio: 0.84; 95% confidence interval [CI]: 0.77, 0.92), and a modest reduction in raw total SRS scores (β: -1.69; 95% CI: -3.3, -0.08).
    
    Who: children born 1999 to 2019 in 32 ECHO cohorts, maternal self-reported fish intake in pregnancy
    Effect: autism diagnosis OR 0.84 (95% CI 0.77 to 0.92); SRS total score beta -1.69 (-3.3 to -0.08)
    Certainty: Self-reported fish, all species pooled; OR, not risk.
    Am J Clin Nutr, 2024 · checked 2026-10-07 · we read the abstract
11. ev-tlpg-11 · Observational data · prevalence survey of food samples · n = —
    The tilapia fish contained type A and B of V. vulnificus at a ratio of 12% and 4%, respectively. ... Raw tilapia fish contained V. vulnificus type A and B, so care in handling is essential or during cooking these kinds of fish.
    
    Who: fresh tilapia samples, Riyadh market, Saudi Arabia
    Effect: V. vulnificus type A 12%, type B 4%
    Certainty: One market, sample count not in abstract.
    Foodborne Pathog Dis, 2025 · checked 2026-10-07 · we read the abstract
12. ev-tlpg-12 · Laboratory or animal data · case report with literature review · n = 1 case plus review
    It is crucial to disseminate the information that pregnant women should refrain from eating high-risk raw fish, including freshwater fish.
    
    Who: one newborn with E. tarda meningitis plus Japanese perinatal case literature
    Effect: perinatal invasive infections in mothers and infants; no rate given
    Certainty: Case report with literature review; tilapia not named in the quote.
    Jpn J Infect Dis, 2023 · checked 2026-10-07 · we read the abstract
13. ev-tlpg-13 · Position of an expert body · agency consumer advice · n = —
    Most seafood should be cooked to an internal temperature of 145°F.
    
    Who: general consumers
    Effect: cook to 145°F internal temperature
    Certainty: General seafood advice, applies to tilapia fillets.
    US FDA, Selecting and Serving Fresh and Frozen Seafood Safely · checked 2026-10-07 · we read the section