Organ meats (non-liver) can be consumed during pregnancy but requires caution. Nutrient-dense but some (kidney, heart) are safe in moderation. The key guidance from ACOG: Cook thoroughly; limit frequency; avoid liver specifically. Potential concerns include: Variable vitamin A content, Heavy metal accumulation in kidney. These risks are manageable when you follow the recommended limits. When consumed appropriately, organ meats (non-liver) does offer benefits such as Iron and B12.
A "Use Caution" rating means this food is generally fine during pregnancy but comes with a specific factor worth managing — a daily limit, a preparation requirement, or a moderation guideline — rather than a reason to avoid it outright. These ratings reflect general guidance from the FDA, ACOG, CDC, and USDA. The goal of the "caution" label is to flag what to pay attention to, not to suggest the food is unsafe when that factor is properly managed.