Usually, a normal delivery can be attempted if the fetal biparietal diameter is under 10cm. In addition to the fetal size, normal delivery also needs to consider the size of the birth canal, labor force, and psychosocial factors. The biparietal diameter of the fetus is an indication used to refer to the size of the fetus. A biparietal diameter of more than 10cm may pose a risk of macrosomia, cephalic dystocia, or shoulder dystocia. The size of the fetus also needs to be assessed in conjunction with other indicators of the fetus, such as abdominal circumference, as well as the position of the fetus and other factors to consider whether or not the fetus can be delivered in a normal delivery. In addition, three other factors should also be taken into account. If the birth canal is loose, the labor will be relatively easy for the same size fetus. If the woman’s pelvis is narrow, the probability of difficult labor is higher. Psychological factors are also a very important aspect of a normal delivery. It is very important for a pregnant woman to maintain an optimistic mindset for a smooth delivery. Therefore, the factors to be considered should not only be the fetus, but also the mother and other factors. If the mother wants to know whether she can have a normal delivery, it is recommended to consult a doctor in time, and under the guidance of the doctor, improve the relevant examinations to further clarify the mode of delivery.