What is the normal head circumference of a 1-year-old baby?

Having a baby at home is very gratifying and happy for parents. Seeing the baby growing up every day, parents and friends will have a very happy feeling. Of course, there are certain medical standards for how to judge whether a baby is continuing to grow. In addition to height, head circumference is also one of them. So, what is the normal head circumference for a 1-year-old baby?

1. At birth

Boys: 31.8-36.3 cm, average 33.9 cm

Girls: about 30.9-36.1 cm, average 33.5 cm

2. Full Moon

Boys: about 35.4-40.2 cm, average 37.8 cm

Girls: about 34.7-39.5 cm, average 37.1 cm

3. Second Month

Boys: about 37.0-42.2 cm, average 39.6 cm

Girls: about 36.2-41.0 cm, average 38.6 cm

4. Third Month

Boys: about 38.2-43.4 cm, average 40.8 cm

Girls: about 37.4-42.2 cm, average 39.8 cm

5. Fourth Month

Boys: about 39.6-44.4 cm, average 42.0 cm

Girls: about 38.5-43.3 cm, average 40.9 cm

6. Fifth Month

Boys: about 40.4-45.2 cm, average 42.8 cm

Girls: about 39.4-44.2 cm, average 41.8 cm

7. Sixth month

Boys: about 41.3-46.5 cm, average 43.9 cm

Girls: about 40.4-45.2 cm, average 42.8 cm

8. Seven to eight months

Boys: about 42.4-47.6 cm, average 45.0 cm

Girls: about 41.2-46.3 cm, average 43.8 cm

9. Nine to ten months

Boys: about 43.8-49.0 cm, average 45.7 cm

Girls: about 42.1-46.9 cm, average 44.5 cm

10. Eleven to twelve months

Boys: about 43.7-48.9 cm, average 46.3 cm