Sushi, particularly varieties that contain raw fish, poses significant risks for pregnant women. Raw fish can harbor harmful bacteria, viruses, and parasites that may lead to foodborne illnesses. These infections can be particularly severe during pregnancy, potentially harming both the mother and the developing fetus.

Besides the risks associated with raw fish, certain types of seafood often found in sushi, like tuna, can contain high levels of mercury, which is harmful to fetal development. For these reasons, it's advisable for pregnant women to avoid sushi that contains raw fish entirely to ensure the best possible outcome for their pregnancy.