How to control and prevent oversized fetus, mainly for oversized fetus cause control, as follows: 1, nutrition during pregnancy: maintain reasonable, comprehensive and balanced nutrition, to avoid excessive nutrition; 2, exercise: appropriate exercise, do what you can, such as housework, walking, yoga, gymnastics, swimming, more exercise can control weight gain; 3, prevention of gestational diabetes: regular maternity checks, diabetes Pregnant women need to strictly follow the diabetic diet to control blood sugar. In short, comprehensive and balanced nutrition, appropriate exercise, to maintain appropriate weight growth, the pregnant woman and the fetus weight control in the normal range.