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um well for a girl, theyre breasts start developing, and that's the first sign of puberty for a girl. and then, shell start growing hair in her underarms and other places, and shell get her period. im 12 and a girl, ive been through a lot of it except the last one.

Girls... The primary change is that they begin to ovulate and can get pregnant, evidence by regular periods (menstruation). The secondary changes in girls are enlargement of breasts and growth of pubic hair (they will also grow hair elsewhere but most woman remove it). A girl's hips will also widen and she will gradually take on a more "feminine" body shape.

Boys... the primary change is that their testes begin to produce sperm. Secondary changes are that they will grow pubic hair, hair in their armpits and on their bodies, they will eventually also grow facial hair. Their voices will deepen as their larynx (Adam's apple or voice box) gets larger. They will grow taller and will also develop a more muscular physique. During puberty boys thoughts frequently turn to sex and they also experience frequent erections. Boys often masturbate and may experience noctural emissions (Wet Dreams). There is also increase in the size of their penis and testes. Both sexes can also suffer from acne (spots) and abrupt mood changes

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13y ago

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