Most pregnant women's milk powder provides sufficient trace elements, such as iron, zinc and copper. , but also provide adequate calcium and phosphorus. Pregnant women must pay attention to the balance of nutrition when choosing milk powder. Some are low-fat or skim milk powder; Some do not contain lactose, and some strengthen folic acid that ordinary milk powder does not have and is urgently needed for fetal development. Some provide essential fatty acids such as linoleic acid and linolenic acid or DHA. Before pregnancy, pregnant women should do a comprehensive examination in the outpatient department or clinic of the hospital to find out what substances they lack, and pay more attention to this nutrient when choosing milk powder.