Ate expired food while pregnant: what to know

What does the evidence say about ate expired food while pregnant during pregnancy?

1. Consumer research shows many people mistakenly believe date labels like 'Best if Used By' determine whether a food is safe, when the label is actually about quality, meaning the product may still be eaten after that date if it's been stored properly. 1
2. FDA guidance for pregnancy food safety recommends checking the refrigerator weekly for items that are past their date or showing signs of spoilage, keeping the fridge at or below 40°F, and reheating ready-to-eat foods until steaming, at least 165°F, before eating them. 2
3. Listeriosis symptoms, which can include diarrhea, fever, muscle and joint pain, headache, stiff neck, back pain, chills, sensitivity to bright light, and sore throat, can take days to weeks to appear after eating contaminated food, and the foods most likely to carry contamination are unpasteurized dairy, undercooked meat and fish, deli meat, and soft cheeses. 3
4. Pregnant women are estimated to be about 10 to 20 times more likely to develop listeriosis than the general population, and a review of documented cases found that people who became sick were significantly more likely to have eaten foods already flagged in population guidelines to approach with caution, like soft cheeses and deli items, rather than random spoiled leftovers. 4
5. Untreated listeriosis in pregnancy can raise the chance of pregnancy loss, preterm delivery before week 37, or low birth weight, with the most severe cases raising stillbirth risk, which is why any concerning meal is worth mentioning to a provider even without obvious symptoms. 3

Is ate expired food while pregnant safe in each trimester?

• First trimester. If you're not sure whether something was still fresh, the type of food matters more than which trimester you're in. High-risk categories like unpasteurized dairy or deli items call for more caution regardless of the date, while a shelf-stable pantry item past a quality date rarely needs a second thought.
• Second trimester. Appetite often picks back up now, so this is a common stretch to double-check dates on dairy, deli meat, and leftovers before a bigger grocery haul. When in doubt, reheating a ready-to-eat item until steaming is the standard fix, not the date on the label.
• Third trimester. Keep doing the same weekly fridge check close to delivery. Because some foodborne illness symptoms can take days to weeks to show up, mention any concerning meal to your delivery team even if it happened a while back.