The Average Weight & Height of Infants

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The Average Weight & Height of Infants
(Rayes/Lifesize/Getty Images)

Not all infants are the same height and weight. Some babies are naturally bigger or smaller than others, and ethnicity, gender and genetics play a role in a child's overall size, according to the KidsHealth website. Doctors use growth charts to track how infants compare to others of the same age, but keep in mind that where a child falls on a growth chart is not necessarily an indicator of good or poor health.

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Baby Girl Height

Based on the Centers for Disease Control and Prevention (CDC) growth charts updated in 2000, the average height for a newborn baby girl is about 19 inches. By 1 year, the average height for girls is just more than 28 inches.

Baby Boy Height

At birth, the average baby boy is about 19 1/2 inches long, according to the CDC. For a 1-year-old, height around 29 1/2 inches is average.

Baby Girl Weight

The average newborn baby girl ways about 3.4 Kilogram, according to the CDC; the average 1-year-old girl weights just more than 9.07 Kilogram.

Baby Boy Weight

A newborn baby boy weights about 3.63 Kilogram on average. By 1 year, the average baby boy weighs about 9.98 Kilogram, according to the CDC.

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