PSY BEH 101D Lecture Notes - Lecture 21: Birth Weight, Smoking And Pregnancy, Psy
17 Dec 2019
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Lecture: height and weight in infancy and childhood. Height and weight in infancy and childhood. Notes: infancy: the average north american newborn is 20 inches long and weighs. Ninety-five percent of full-term newborns are 18 to 22 inches long and weigh between 5 and 10 pounds. In the first several days of life, most newborns lose 5 to 7 percent of their body weight. Once infants adjust to sucking, swallowing, and digesting, they grow rapidly, gaining an average of. 5 to 6 ounces per week during the first month. Typically they have doubled their birth weight by the age of 4 months and have nearly tripled it by their first birthday. Infants grow about 3/4 inch per month during the first year, increasing their birth length by about 40 percent by their first birthday. Infants" rate of growth slows considerably in the second year of life.
