Pregnant women should start taking DHA when they are about 5 months pregnant. DHA is one of the most important substances to promote the development of nerve cells in the brain. In the 5th month of pregnancy, the fetus already has nerve cell development, and taking DHA at this time helps to promote the development of brain cells and retinal development, which can enhance the development of brain cells in the fetus. After the baby is born, it has the effect of promoting enhanced memory, and can also help improve vision can play a role in protecting the eyes. It should be taken from the 5th month of pregnancy, until after the baby is born, when the baby can eat supplementary food, let the baby continue to supplement DHA, about 6 months after the baby is born, should be taken from the 5th month of pregnancy until 6 months after the baby is born, during the breast milk should also be timely supplementation of DHA, can be conveyed to the baby through breast milk nutrients, after the baby is born 6 months can After 6 months of life, the baby can eat by himself, so he does not need to supplement through breast milk.