Fetal biparietal diameter and femur length are three weeks larger than the normal gestational week. It is considered to be early fetal development, which indicates good nutritional status and may also be related to heredity to a certain extent. Because of the current improvement in living standards and adequate nutritional intake, it is common for fetuses to develop ahead of schedule; if no other malformations are found during the examination, no special treatment is usually needed. If the parents are taller and have a larger head circumference, the child may also be affected by genetic factors and develop this condition. Pregnant women must strictly control their weight gain during pregnancy to avoid the development of gestational diabetes or giant babies, so that they will not encounter danger during labor. During pregnancy, you should take pregnancy checkups on time in order to know the development of the fetus, and any abnormality should be handled under the guidance of the doctor.