Findings indicate that there are opposite changes of brain activity in boys and in girls as they go through puberty.
Children as young as eight are vulnerable to poor body image as hormone levels rise with the onset of puberty, a new study has found.
For the past 50 years, researchers have known that girls who get their periods earlier.
The age at which girls have their first period may influence how long they stay.
In schools where sanitary pads or puberty education were not provided, over 18 months levels.