author={J. R. Bierich},
  journal={Klinische Wochenschrift},
  volume={59 17},
Puberty commences in girls 1.5-2 years earlier than in boys. Whereas the production of sexual hormone in the female increases gradually, testosterone secretion in the male rises steeply within two years. In connection with this boys are suffering more often from emotional disturbances than girls during puberty. During the last 150 years the onset of puberty… CONTINUE READING