Taking DHA during pregnancy is beneficial, but it should not be taken at random and should be used under the guidance of a medical professional. DHA, also known as docosahexaenoic acid, is an essential unsaturated fatty acid that promotes neurological function, vision, immune system development and other functions, especially for pregnant women and infants. In the mid-pregnancy of pregnant women, it is the period when the need for DHA will gradually increase, and supplementation at this time is most important for fetal neurodevelopment. Foods such as deep-sea fish can also be consumed to increase the intake of DHA. Pregnant women should be guided by professionals when using DHA, and pay attention to daily diet and balanced nutrition to meet the needs of the body and obtain the best results.