1. Eating walnuts during pregnancy is very beneficial to the fetus, which can promote fetal brain development and supplement various trace elements, because walnuts are rich in trace elements and DHA.

2. During pregnancy, regular diet contributes to the normal development of the fetus, but you can't eat too much. Eating too much can easily lead to increased gastrointestinal burden, indigestion, nausea and vomiting.

3. Eating walnuts in moderation in the middle and late pregnancy can also help defecate and prevent constipation. However, balanced nutrition is needed during pregnancy, and attention should be paid to eating more fresh fruits and vegetables, which are rich in vitamins and can improve the body's immunity.