Both [[men]] and [[women]] develop breasts from the same embryological tissues. However, at [[puberty]], [[female]] sex hormones, mainly estrogen, promote breast [[development]] which does not occur in men. As a result, women's' breasts become far more prominent than those of men. | Both [[men]] and [[women]] develop breasts from the same embryological tissues. However, at [[puberty]], [[female]] sex hormones, mainly estrogen, promote breast [[development]] which does not occur in men. As a result, women's' breasts become far more prominent than those of men. |