Growth of body hair, including underarm, abdominal, chest hair and pubic hair. Loss of scalp hair due to androgenic alopecia can also occur. Greater mass of thigh muscles in front of the femur, rather than behind it as is typical in mature females Growth of facial hair Enlargement of larynx (Adam's apple) and deepening of voice[9] Increased stature; adult males are taller than adult females, on average Heavier skull and bone structure Increased muscle mass and strength Larger hands, feet and nose than females and prepubescent males Larger bodies Square face Small waist, but wider than females Broadening of shoulders and chest; shoulders wider than hips[4] Increased secretions of oil and sweat glands, often causing acne and body odor[9] Coarsening or rigidity of skin texture due to less subcutaneous fat Higher waist-to-hip ratio than prepubescent or adult females or prepubescent males, on average Lower bodyfat percentage than prepubescent or adult females or prepubescent males, on average Enlargement of the penis