Crab is cold in nature, eating crab in early pregnancy can easily lead to abdominal pain, irregular vaginal bleeding, and in severe cases, it can induce uterine contraction and lead to preeclampsia, or even embryonic developmental arrest and other undesirable consequences, if a small amount of crab is eaten generally not a big problem, so the main thing is to pay attention to the amount of intake. Not only in the early stages of pregnancy to avoid eating crabs, in the whole pregnancy should also try to avoid the intake of crabs, aloe vera leaves, turtle and other food, easy to lead to fetal dysplasia. Usually pay attention to regular maternity checkups, timely oral folic acid tablets in early pregnancy to prevent fetal neural tube development malformations, usually pay attention to more exercise, especially aerobic exercise, such as yoga, swimming, slow walking, walking, etc., and at the same time more sunshine to enhance the individual’s physical fitness, but also a regular maternity checkups.