Foods that have the effect of inducing uterine contractions have the potential to cause preterm labor. However, when the pregnancy process is completely normal, the effect of food on the time of delivery is not very obvious. The common foods that may induce uterine contractions and cause preterm labor include: first, hawthorn. It is a common food with blood circulation and promote uterine contraction. In the early stages of pregnancy, eating too much hawthorn may cause miscarriage, and late pregnancy may induce preterm labor. Second, crab. The crab is a typical representative of cold food, because of its cold nature, and has a blood-breaking effect, late pregnancy, if too much eating crab, may induce uterine contractions and lead to preterm labor. Third, snapper. The snapper is also a kind of food that is cold in nature. Excessive consumption may induce contractions and lead to preterm labor. However, the reaction of different individuals after eating these foods is not exactly the same, a small amount of food is generally not a big problem.