Hello, I'm glad to provide you with consulting services. Fetal head and thigh are short, which is a normal physiological phenomenon during pregnancy. As long as it is within the normal range, Ma Bao should not worry too much. From fetus to infancy, the development of the baby's head precedes the development of limbs and trunk, so the head accounts for the largest proportion of the body. With the growth of the baby, the older the child, the greater the proportion of limbs, and gradually transition to normal proportion.