Increase occurs in bone length and density feet and fingers lengthen, then arms and legs, then torso Weight gain becomes

. Girls on average are about two years ahead of boysMenarche and spermarcheTiming can be affected by genetics, ethnicity, and body fatindividuals with stockier builds experience puberty earlierchronic malnutrition limits fat, thus delaying puberty by several years. At puberty, the pituitary glan

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