The role of DHA in pregnant women: DHA in pregnant women is a long-chain unsaturated fatty acid often needed in the body of pregnant women. Among them, DHAaccountsforallomega-3 fatty acids play an important role in brain development and vision of fetuses and infants. In addition, DHA can also protect the health of pregnant women and fetuses, increase the weight and height of the fetus after birth, and reduce the risk of premature birth. Brands with Higher DHA Content There are many different DHA brands for pregnant women on the market, some of which are significantly superior in terms of DHA content.