Puberty is that episode in development when a child develops into an
adolescent with the physical ability to reproduce. For girls these changes
Breast development. The first sign of breast development
(the 'thelarche') is enlargement of the nipples around the
age of 11years (normal range 9-14). Full breast development
takes about four years but may last as long as nine years. Frequently, one breast may seem to enlarge faster than the
other although generally nature will ensure that they are equal when fully developed.
Pubic hairs start to show around the time of breast
development and the axillary (armpit) hair follows about two
years after the pubic hair.
The various parts of the vulva (Figure
2.2) and the vagina slowly enlarge during puberty.