In order to develop standards for upper lip hair in adolescent girls, 4693
observations in 856 black and white subjects were made over 9 years. Up to
2 years after menarche, 90% of girls had no upper lip hair. More than 2 yea
rs after menarche, 48.8% of black girls and 9.0% of white girls had small a
mounts of upper lip hair. This may be more significant in adolescent girls
than in older women.