Enlargement of breasts and erection of nipples.[4] Growth of body hair, most prominently underarm and pubic hair Greater development of thigh muscles behind the femur, rather than in front of it Widening of hips;[5] lower waist to hip ratio than adult males Smaller hands and feet than male adults Elbows that hyperextend 5-8° more than male adults[6] Rounder face Smaller waist Upper arms approximately 2 cm longer, on average, for a given height[7] Changed distribution in weight and fat; more subcutaneous fat and fat deposits, mainly around the buttocks, thighs, and hips Labia minora, the inner lips of the vulva, may grow more prominent and undergo changes in color with the increased stimulation related with higher levels of estrogen.[8]