In both boys and girls, puberty is triggered by the pituitary gland in the brain. This gland stimulates other glands to release sex hormones. In boys, the changes are triggered by testosterone, which is produced by the testes. In girls, they are triggered by oestrogen, produced by the ovaries.
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In both boys and girls, puberty is triggered by the pituitary gland in the brain. This gland stimulates other glands to release sex hormones. In boys, the changes are triggered by testosterone, which is produced by the testes. In girls, they are triggered by oestrogen, produced by the ovaries.