Pregnant women who do not get enough DHA in their diets can take DHA in moderation for the benefit of fetal development. DHA is a kind of unsaturated fatty acid, mainly from some seafood. Appropriate supplementation of DHA to pregnant women can promote the development of the fetal nervous system, vision and so on. You can take DHA from foods such as deep-sea fish, walnuts, pine nuts, etc. in your regular diet to promote the growth and development of the fetus. In addition to supplementing DHA during pregnancy, folic acid and trace elements should also be supplemented to ensure balanced nutrition during pregnancy. When supplementing, pregnant women should also pay attention to controlling their own weight to avoid excessive weight gain. Pregnant women should take DHA under the guidance of a doctor, not blindly, in order to avoid adverse reactions caused by improper use.