DHA should be taken during pregnancy, but it is not necessary to take it, and DHA can also be supplemented through diet. DHA is an unsaturated fatty acid, which is the main component of brain tissue and retina. Moderate supplementation of DHA during pregnancy can promote the development of fetal brain neurological and visual functions; if the DHA content in pregnant women’s body is insufficient, it may affect fetal brain development, which is not conducive to eugenics. The DHA needed by pregnant women can be obtained through diet, you can choose to eat 2 times a week fat-rich deep-sea fish and other foods to supplement, such as sardines, scaled shrimp and so on. If a pregnant woman is experiencing severe vomiting, or if her dietary sources are insufficient, she may consider choosing a DHA supplement to meet her daily DHA intake needs during pregnancy. When choosing DHA supplements during pregnancy, you need to make sure the quality of the product is qualified and choose products from regular manufacturers.