Sashimi (raw fish slices) should be avoided during pregnancy due to risk of parasites (Anisakis), bacteria (Listeria), and mercury exposure. The FDA recommends pregnant women avoid all raw fish.
An "Avoid Completely" rating means major health authorities (FDA, ACOG, CDC, and/or USDA) advise against this food during pregnancy due to a specific, well-documented risk — not a minor precaution or a matter of personal preference. Foods in this category typically carry either no safe preparation method (as with alcohol) or a meaningfully elevated risk of foodborne illness or fetal harm even with careful handling. If you’re unsure whether a past exposure is a concern, your provider is the best resource for guidance specific to your situation.