What is the standard for baby head circumference development?

The growth and development of a baby is a very important thing, especially for every parent, they are always paying attention to whether the baby is growing up healthily. For babies, the development of head circumference is also a very important developmental aspect. The development of a baby's head circumference can reflect whether a baby's brain is healthy. If any abnormal phenomenon occurs, it often indicates that the baby has some disease in his head.

A baby's head circumference is generally relatively large at birth, averaging 32-34cm, 38-40cm at 3 months, around 46cm at 1 year old, and about 48cm at 2 years old. A smaller head circumference often indicates brain maldevelopment, and rapid growth of head circumference often indicates hydrocephalus.

At birth

Boys: about 31.8-36.3 cm, average 33.9 cm Girls: about 30.9-36.1 cm, average 33.5 cm

Full Moon

Boys: about 35.4-40.2 cm, with an average of 37.8 cm. Girls: about 34.7-39.5 cm, with an average of 37.1 cm.

Second month

Boys: about 37.0-42.2 cm, with an average of 39.6 cm. Girls: about 36.2-41.0 cm, with an average of 38.6 cm.

Third month

Boys: about 38.2-43.4 cm, with an average of 40.8 cm. Girls: about 37.4-42.2 cm, with an average of 39.8 cm.

Fourth month

Boys: about 39.6-44.4 cm, with an average of 42.0 cm. Girls: about 38.5-43.3 cm, with an average of 40.9 cm.

Fifth month

Boys: about 40.4-45.2 cm, with an average of 42.8 cm. Girls: about 39.4-44.2 cm, with an average of 41.8 cm.

Sixth month

Boys: about 41.3-46.5 cm, with an average of 43.9 cm. Girls: about 40.4-45.2 cm, average 42.8 cm

Seven to eight months

Boys: about 42.4-47.6 cm, with an average of 45.0 cm. Girls: about 41.2-46.3 cm, with an average of 43.8 cm.

Nine to ten months

Boys: about 43.8-49.0 cm, with an average of 45.7 cm. Girls: about 42.1-46.9 cm, with an average of 44.5 cm.

11 to 12 months

Boys: about 43.7-48.9 cm, with an average of 46.3 cm. Girls: about 42.6-47.8 cm, with an average of 45.2 cm.

13 to 15 months

Boys: about 44.2-49.4 cm, with an average of 46.8 cm. Girls: about 43.2-48.4 cm, with an average of 45.8 cm.

Compare with the above head circumference development standards and quickly observe whether your baby is developing normally. You can choose to use some soft props to test the baby, such as cloth strips, soft rulers, or some wool, which will make your measurement more convenient. Sometimes the baby's head will move around, so you need to be patient!