In comparison to the male thorax, the female thorax is mostly smaller, less muscular and the sternum slightly more prominent.
Figures 1 to 5: The size and form of the female breast, the nipples and the area around vary considerably in-between individuals and in relation to age and function.
The breast is mainly located in-between the 3 th and 6 th rib and rather near the lateral border of the chest. Moderate asymmetry in-between the two breasts is common. The direction of the nipples varies in-between about 45 degrees up, down and to the lateral side in relation to a vertical line to the surface of the chest.
Elevation of the arm (fig. 4) and inspiration and lift the breast, inspiration in addition moves it to the side. Laying back flattens the breast.