When women are pregnant, they should absorb enough nutrients for the fetuses so as to maintain the normal growth of the fetuses. During the pregnancy, expectant mothers should at least supplement seven kinds of nutrients, including trace elements, fat, carbohydrate, , vitamins, and protein. 

Trace elements are the essential nutrients needed by the fetuses to develop the brain cells. Trace elements are mainly contained in animal blood and red lean meat like beef and pork. These foods all contain abundant hemoglobin and myohemoglobin which can contain rich iron. What’s more, milk can also be drunk in everyday life.

The amino acid contained in fat is an important element to support the formation of brain cells and medullary sheath for the fetuses. Therefore, the moderate intake of the foods containing fat is very necessary. Pregnant women should eat fat meat in a moderate amount.

Carbohydrate is the essential nutrient to maintain the normal metabolism for the fetuses. Pregnant women should maintain the normal level of blood sugar, or the metabolism of the fetuses can be seriously affected. Grains, vegetables and fruits all contain abundant carbohydrates.

Water is essential to all the people. During the pregnancy, the volume of blood flow inside the pregnant women’s bodies becomes rather high and a large amount of water is needed. Therefore, expectant mothers should drink a lot of water. At least 1000 to 1500 milliliters of water should be drunk.

Vitamins can be divided into liposoluble vitamin and water-soluble vitamin. Different kinds of vitamin play different roles in maintaining the growth of fetuses. For example, vitamin A can effectively maintain the normal growth of the body and olfaction, and vitamin C can accelerate the formation of bones and teeth for fetuses. Abundant vitamins are contained in vegetables and fruits, so pregnant women should often eat these foods to supplement vitamins in time.

Cellulose can effectively prevent constipation, a kind of common disease among pregnant women. Fruits and vegetables contain abundant cellulose. Pregnant women should eat vegetables and fruits in everyday life.

Protein is one of important compositions of the body of fetuses. The balanced diet can supplement enough protein for expectant mothers. Milk and eggs contain complete protein which is easy for the human body to absorb. In addition, fish, meat and shrimp also contain high-quality protein. Soy bean and bean products can also provide high-quality for the human body.

In short, adequate intake of various nutrients can effectively improve the physical health for the fetuses. The normal growth of the fetuses can be achieved.