#infant physiology

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Infant Physiology

-- typical newborn weight is 6 to 8 pounds

-- weight typically doubles by six months

-- weight typically triples by one year

-- newborn’s head makes up 25% of the body

-- newborn’s head can be a significant source of heat loss

-- neonates often lose weight in the first couple of weeks, then begin to gain it back

-- fontanelles fully fuse by 18 months

-- depressed fontanelles can indicate hypovolemia

-- infants are often nose breathers

-- infants develop respiratory distress easily

-- rapid breathing can lead to fluid loss and body heat loss