Fast food (cooked) can be consumed during pregnancy but requires caution. Generally safe when hot and freshly prepared; high sodium and fat. The key guidance from FDA: Order hot items freshly made; avoid items sitting under heat lamps. Potential concerns include: High sodium, High saturated fat, Listeria risk in cold items. These risks are manageable when you follow the recommended limits.
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.