Breast
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The breasts are two prominences located on the upper ventral region of the torso in humans and other primates. Both sexes develop breasts from the same embryological tissues. The relative size and dev
Morphology of female human breasts, with the areola, nipple, intermammary cleft and inframammary fold
Male human breasts with defined pectoral muscles
Mountain gorilla breastfeeding an infant
Breast development in puberty is measured with the five-stage Tanner scale
Puberty
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Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction. It is initiated by hormonal signals from the brain to the gonads: the
Breast
…secondary sex distinction between females and males. There is also considerable variation in size between individuals. Permanent breast growth during puberty is caused by estrogens in conjunction with the growth hormone. Female humans are the only mammals that permanently develop breasts at puberty; all other…
Development of a male from childhood to the end of puberty
Male at 11.3 yo (prepubertal), 12.5 yo, 14.9 yo and 16.3 yo (post pubertal)
Facial hair of a male