Assuming that a newborn infant is normal, his brain will be about one quarter the size of an adult human brain and will weigh about one pound or less.

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This statement is true. A newborn infant's brain is about one quarter the size of an adult human brain and typically weighs around one pound or less. The brain will grow rapidly during the first few years of life, and by age three, it will be about 80% of its adult size.

Assuming That a Newborn Infant Is Normal, His Brain Will