Fish During Pregnancy: Could It Affect Preeclampsia

Could eating fish reduce the risk of high blood pressure in pregnancy?

Researchers in Japan followed a prospective approach to explore whether fish consumption before and during pregnancy was linked with hypertensive disorders of pregnancy. These include gestational hypertension, which develops after pregnancy begins, and preeclampsia, a condition involving high blood pressure and signs that other organs may be affected. The study adds to questions about how diet before and during pregnancy relates to maternal health.

Prospective studies can identify patterns between reported eating habits and later health outcomes, but an association does not prove cause and effect. Other factors—including overall diet, health conditions, and social circumstances—may influence both food choices and pregnancy outcomes. The available summary does not provide enough detail to draw conclusions about a particular amount or type of fish, or to recommend changing intake to prevent these disorders.

Is fish safe to eat during pregnancy?

Fish provides protein and nutrients, including omega-3 fats, that can contribute to a balanced diet. Some fish contain higher levels of mercury, however, and pregnancy guidance commonly advises choosing varieties lower in mercury while avoiding those identified as high-mercury. Recommendations differ by country and can depend on local fish species and contamination advice, so pregnant people should consult their national health guidance or clinician.

Diet is only one part of prenatal care. Regular pregnancy visits help clinicians monitor blood pressure and assess symptoms or risk factors. Severe or persistent headache, vision changes, sudden swelling, or upper abdominal pain during pregnancy can require prompt medical assessment; people with concerns should contact their maternity care team rather than relying on a dietary change.