When a newborn is born, the fontanel is usually visible and the posterior fontanel is usually closed. It is abnormal if neither the front nor the back of the fontanel can be seen, but it is normal if only the posterior fontanel cannot be seen. The fontanel and the bone gap are the indicators for evaluating the growth and development of the newborn’s skull. The anterior fontanel is a large fontanel, which is 1~2cm at birth, gradually becomes smaller and disappears around 6 months, and closes at the latest at the age of two years; the posterior fontanel is a small fontanel, which is very small or already closed at birth. Therefore, it is abnormal for a newborn to be born with neither anterior nor posterior fontanel visible, and it is normal for only the posterior fontanel to be invisible. The fontanel, bone gap, spine, long bones, milk teeth, permanent teeth can monitor whether the newborn is normal growth, once abnormalities should be timely consultation, treatment under the guidance of the doctor, daily attention to the newborn’s diet.