Nutritional supplements that pregnant women need. Proper nutrition for pregnant women can have a positive effect on pregnancy and fetal development. Some necessary nutrients, such as folic acid, calcium, iron, DHA, etc., are the nutritional supplements that pregnant women need most. The following details the nutrients and corresponding supplements that pregnant women need from many aspects. Folic acid Folic acid is an essential vitamin for pregnant women. Scientists have found that folic acid supplementation for pregnant women in the first three months of pregnancy and during pregnancy can effectively prevent