Pregnant women are not allowed to eat crab in the early stages of pregnancy. Although crab is rich in nutrients and tasty, rich in protein and various trace elements, crab is cold in nature and has the effect of soothing the tendons and benefiting the qi, regulating the stomach and eliminating food, clearing the meridians, dispersing all the heat and dispersing blood stasis. Pregnant women who eat crab may suffer from diarrhea, which may stimulate contractions leading to miscarriage, especially in early pregnancy when the placenta of the fetus has not yet formed and the fetus is still unstable, making it more likely to miscarry. The crab claws of crab have the effect of dispersing blood stasis, which may also lead to bleeding and miscarriage in early pregnancy. It is best not to eat crab, even if it is not in the early stages of pregnancy, because even if you have no allergies to crab and other seafood before pregnancy, you may have allergies during pregnancy.