Tanner staging of physical development in adolescent girls
| Stage | Pubic hair | Breast development |
| 1 | Prepuberty | Prepuberty |
| 2 | Narrow border along the labia majora | Small mound and areola starts to grow |
| 3 | Becoming darker and more curly, spreading to mons pubis | Further increase and loss of contour of separation between breast and areola |
| 4 | Increasing but still just at mons pubis | Areola and nipple form secondary mound |
| 5 | Spreads to adult female triangle pattern | Adult breast appearance |