Pregnant women taking DHA does not have the efficacy and function of drugs, and can play a supplementary role in nutrition. DHA is an essential unsaturated fatty acid, is the English abbreviation for docosahexaenoic acid, which indicates that DHA is a nutrient, not a drug, there is no drug function, so pregnant women to eat DHA and will not play a special role in efficacy and function, can only play a supplementary role in nutrition. DHA is usually more abundant in fish, so life pregnant women can eat fish oil to supplement DHA; in addition to DHA, pregnant women need to maintain a scientific dietary structure, a variety of nutrients should be ingested, in order to help meet the needs of the mother’s body and the growth and development of the fetus. If necessary, pregnant women can also develop individualized recipes under the guidance of a professional physician, so as to avoid blind diet, resulting in adverse consequences.