The onset of puberty is normally triggered by the hypothalamus (the area of the brain that helps control pituitary gland function). It signals the pituitary gland (a pea-sized gland near the base of the brain) to release hormones that stimulate the ovaries (in girls) or testicles (in boys) to make sex hormones.
Sometimes, precocious puberty stems from a structural problem in the brain (such as a tumor), brain injury due to head trauma, an infection (such as meningitis), or a problem in the ovaries or thyroid gland that triggers the onset of puberty ahead of schedule — but this usually isn't the case.
For the majority of girls, there's no underlying medical problem — they simply start puberty too early for no known reason. However, you may feel reassured if you speak with your GP and if necessary a specialist appointment can be discussed.
Regards
Brenda
Women’s Health Educator
Health Information Line, Women’s Health Queensland Wide
Women living in Queensland can also call our Health Information Line - a free information and referral service for Queensland women - on 3839 9988 or 1800 017 676 (toll free outside Brisbane).
Please note that all health information provided by Women’s Health Queensland Wide is subject to this disclaimer
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