Genetic factors are one of the important factors affecting fetal growth and development. Parents' genes determine the growth potential of the fetus, including genetic information such as height and weight.
Environmental factors will also affect the development of the fetus. If the living environment and sanitary conditions are good, pregnant women are often in fresh air, which is beneficial to the development of the fetus.
Nutrition is also an important factor affecting fetal development. Pregnant women need to take a variety of nutritional factors to supplement the nutrition needed for fetal development during pregnancy. If the nutrition is insufficient or unbalanced, the fetus will develop slowly and lose weight.
Disease factors are also one of the factors affecting fetal development. If the fetus suffers from certain diseases, it will affect its normal development.