Level 1: The impact of pregnant women eating fish on fetal brain development. With the continuous advancement of science and technology, people are paying more and more attention to the impact of pregnant women’s diet on fetal health. Many studies have shown that moderate consumption of fish rich in Omega-3 fatty acids during pregnancy can promote fetal brain development. This is because Omega-3 fatty acids are an important component of neuron cell membranes and are essential for the normal development of nerves.