all of the szell ties is a professor of psychology at friedrich alexander university in erlang and his research work focuses on how testosterone affects the body specifically bone growth . and some effect from distance to own just asteroids and extradite this counterpart in females and contribute significantly to bone strength and density action from prenatal development to maturity of your own personal income and in the. clear example during the 1st 3 months of pregnancy testosterone causes the ring fingers of the male fetus to grow longer than the index fingers in the sling fingers the. ties notes that in general women's index fingers are longer than they ring fingers in men it's just the opposite. here you can see that in this image of a man's hand. index finger is clearly shorter than the ring finger. because. testosterone clearly has an influence on bone growth even in the early stages of pregnancy it may also be responsible for the early development of the so-called power motive. shawn so this is as a scientist so i'm interested in finding out where that motive comes from i suspe