Women are prone to miscarriage when they eat crabs after they are just pregnant, because crabs are cold food, and the muscles inside the legs of crabs have a certain effect of sliding the fetus, and consuming too much crabs is prone to cause bleeding, which will eventually lead to miscarriage. There are many toxins, parasites and pathogenic bacteria in crabs, which can easily make pregnant women suffer from diarrhea and abdominal pain. If the crabs eaten are dead, a series of gastrointestinal reactions are more likely to occur. If a pregnant woman has no adverse symptoms after eating crabs, she should not worry too much. Once abnormal symptoms occur, such as abdominal pain, diarrhea, small amount of vaginal bleeding, and lower back pain, she should go to the hospital in time to check the development of the fetus through ultrasound, and take conservative treatment if necessary. Therefore, it is recommended that women in the early stages of pregnancy do not eat crabs and other cold foods, and regular pregnancy tests.