DHA refers to docosahexaenoic acid, and it is usually recommended that pregnant women can take DHA supplements during pregnancy, which is good for the development of the fetus’s vision and brain, as well as for the physical and mental health of the pregnant woman. DHA has a great deal to do with the growth of nerve cells in the human brain and retina, and the period from the third trimester of pregnancy to six months postpartum is the optimal time for the neural development of the baby’s brain. The DHA needed for the development of the baby’s brain is obtained from the mother, so it is important to take DHA supplements during pregnancy to ensure the growth and development of the baby’s brain and nerves. Taking DHA can reduce the neurasthenia and depression that occurs after pregnancy, and it can also reduce the risk of preterm labor. In addition, the growth and development of the fetus is good, can improve the resistance of the fetus, enhance immunity, pregnant women play a very good protective role, is conducive to the physical and mental health of pregnant women. If the pregnant woman after the consumption of DHA discomfort symptoms, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.