After pregnancy, women’s demand for nutrients increases, especially for vitamin A, vitamin B, vitamin D and other nutrients, and if there is a lack of nutrients in the body during pregnancy, it will affect the normal development of the fetus. You can take multivitamins to supplement your nutrition during pregnancy, but it is not necessary to do so, mainly based on the pregnant woman’s own situation. If a regular maternity checkup reveals no nutrient deficiencies, there is generally no need to take multivitamins. If only one or two vitamin deficiencies are found during the maternity checkup, you can supplement your daily diet or take a separate supplement without taking a multivitamin. Excessive vitamin supplementation may have certain effects on the fetus that outweigh the benefits. Pregnant women should take whatever supplements they need during pregnancy and should not take vitamin preparations blindly. When they must use them, they should take them strictly according to medical advice, take them regularly and quantitatively, and stop them in time when their condition improves.