Whether the baby is smart is mainly determined by congenital and acquired factors, pregnant women can eat some fish during pregnancy, help the baby’s neurological development as well as physical growth, but just rely on eating fish to make the baby smart is not reliable. Fish is very nutritious, can give pregnant women to supplement high-quality protein, especially deep-sea fish, but also has a certain lowering of blood lipids and other effects, for pregnant women and babies have certain benefits. It is generally recommended that pregnant women eat 3-4 taels of lean meat every day and 2-3 times a week of deep-sea fish. 1, yellow croaker, scallop: rich in a variety of vitamins, as well as calcium, phosphorus, iron, magnesium and other trace elements, which helps to replenish the nutrients needed by pregnant women and their babies, and also contains high-quality unsaturated fatty acids, which can promote the development of fetal brain development. 2, sardines: this type of deep-sea fish contains a high degree of DHA, which can assist in the development of fetal brain cells, appropriate consumption, must be eaten. Brain cell development, appropriate consumption, to a certain extent, can be avoided after the birth of the fetus due to abnormal neurodevelopment resulting in reduced intelligence; 3, cuttlefish: has a tonic essence, spleen and other efficacy, appropriate consumption helps pregnant women nourish the body. However, it should be noted that cuttlefish contains high cholesterol, pregnant women should not eat too much, to avoid the occurrence of complications during pregnancy; 4, bass: pregnant women eat bass, both healthy body and blood, there is a certain role of fetal safety. In addition, bass contains a high proportion of unsaturated fatty acids, beneficial to fetal brain development; 5, crucian carp: high protein, low fat characteristics, can supplement the pregnant women and the fetus need vitamins, trace elements, amino acids, etc., to help the development of the fetus. At the same time, it also has the effect of benefiting the qi, spleen, and lactation, etc., for the loss of appetite during pregnancy, as well as postpartum lactation of pregnant women, etc. are of some benefit. Pregnant women eating fish, need to pay attention to the way of cooking, try to use boiled or steamed way, light diet, do not consume too much fat, usually also pay attention to rest, maintain sufficient sleep and nutritional balance. However, it should be noted that some deep-sea fish contain mercury, such as squarehead fish, swordfish, etc., mercury can enter the fetus through the placenta, which will not only affect the growth and development of the fetus, and will even cause some damage to the fetal brain development, should be avoided.