Normal vaginal discharge becomes noticeable. Acne may appear as sweat and oil glands become more active. The vagina becomes longer and the labia more pronounced as both internal and external reproductive organs and genitals grow. Sometime between ages 10 and 16. Both the areola and nipples grow.
Pubic hair begins to take a triangular shape and underarm hair appears.
The first menstrual flow or period occurs. As internal organs continue to develop, the ovaries may begin to produce mature eggs that are capable of being fertilized. Growth in height occurs more slowly. Sometime between ages 12 and 19. Breasts approach adult size and shape and pubic hair spreads to the top of the thighs.