It is normal to find that the fetus is 1 week big during pregnancy test, mostly related to the time of conception, pregnancy nutrition, etc. It is divided into the following cases: 1. time of conception: women who have irregular menstrual flow and cannot accurately project the date of conception may have the situation that the fetus is 1 week big during pregnancy test. You can go to a regular hospital for an ultrasound examination, and the doctor will make a projection based on the fetal development; 2. Nutrition during pregnancy: pregnant women take a lot of nutrition during pregnancy, and there is an excess of nutrition, coupled with less exercise during pregnancy, and they cannot consume their own energy. In addition to causing the pregnant woman’s own overweight, it can also cause the fetus to be large in size, appearing to be 1 week too large. In such cases, pregnant women should pay close attention to the fact that a large fetus is not conducive to childbirth, so they need to control their diet and do appropriate activities. After finding out that the fetus is 1 week big, pregnant women should control the intake of high protein and greasy food such as dairy products and meat under the guidance of the doctor. Eat more fresh vegetables and fruits and do proper activities, such as walking after meals, to prepare for a smooth delivery. Do regular pregnancy checkups to observe the intrauterine growth of the fetus and deal with it early if abnormalities are found.