It is best for pregnant women to start taking dha supplements during the preparation period because it is very good for the fetus to take dha supplements at this time. If you don’t take dha supplements during the preparation period, you don’t have to worry too much, you can start taking dha around the second month of pregnancy, because from the seventh week of pregnancy, the fetal brain starts to take shape and thereafter the brain develops more rapidly, and dha has a great effect on the fetal brain development, so you should take dha supplements at the early stage of pregnancy. dha supplements can promote the development of the fetal brain and retina, so it is vital for the fetus. Therefore it is vital for the fetus. However, the more dha you take, the better. As a nutrient, it has certain benefits, but it should not be taken in excess, and must be balanced.