all of the szell ties is a professor of psychology at friedrich alexander university in ellen his research work focuses on how testosterone affects the body specifically bone growth. companies would know some effect from distance their own just tossed around and extradite its counterpart in females and contribute significantly to bone strength and density engine from prenatal development to maturity. in the. clear example during the 1st 3 months of pregnancy if testosterone causes the ring fingers of the male foetus to grow longer than the index fingers in a sling fingers. show 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 that. goes 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. as a scientist so i'm interested in finding out where that motive comes from i suspect that its origins ca