Pregnancy should take DHA around 16 weeks, DHA is synthesized in the body in very small quantities and therefore needs to be obtained from food.DHA works to promote brain and sensory development in babies during pregnancy. DHA supplementation during pregnancy can promote fetal brain development. The phospholipid composition of fetal brain cells requires the involvement of DHA, so DHA supplementation can promote the development of brain cells and brain nerves. DHA supplementation can also promote fetal sensory development, the principle is that DHA accelerates the development of retinal photoreceptor cells in the fetus. Fetal brain and eyes start to develop after 16 weeks of pregnancy, and DHA supplementation is needed at this time. In addition to taking DHA medication, deep-sea fish oil and flaxseed oil, nuts also contain a lot of DHA, you can add deep-sea fish oil and flaxseed oil in the food, eat some nuts every day. But note that health products can not be used as drugs, there is no therapeutic effect. Pregnant women should have regular labor and delivery checkups in order to keep an eye on the baby’s health.