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In the male growth of the genitalia and breasts is proportional to general body growth. Height increases at a rate of about 5 to 6 centimeters per year. There is no course pubic hair. In the female growth of the genitalia and breasts is proportional to general body growth. Height increases at a rate of about 5.00 to 6.00 centimeters per year.There is no coarse pubic hair. In females throughout childhood ovarian follicles continuously begin to grow and secrete low levels of estrogen but then degenerate by atrisia.
In the male at about age 11.5 years the testes and penis begin to increase in size. At about 12 years there is a slight increase in coarse pigmented pubic hair. In the female at about age 10.9 years, breast buds become palpable and the areole enlarge. A minimal amount of coarse pigmented pubic hair appears on the labia around age 11.2 years.
At about age 13.8 years in the male, height increases at a maximal rate of about 10 centimeters per year. The testes and penis continue to increase in size, pubic hair is of adult quality but not yet spread to the junction of the medial thigh with the paranium. Hair appears on the voice changes around age 14 years and acne appears several months later.In the female, the increase in height slows to about 7 centimeters per year. Around age 12.9 years the areole begins to form secondary mounds on the breasts. Pubic hair becomes of adult quality though it does not spread to the junction of the medial thigh and perineum.
In the male height does not increase after age 17 years. The testes are greater than 4.5 centimeters in length and the penis reaches its mature size by age 16.5 years. Adult pubic hair spreads to the medial thigh. Hair appears on the sides of the face and the mature male physique is attained.In the female height does not increase after age 16 years. Breasts have the adult contour with the areole recess to the general contour of the breast. Adult pubic hair spreads to the medial thigh.