 | reproduction, sperm and, 25
|
 | reproductive health and environmental estrogens, 19
|
 | reproductive success and testosterone, 122124, 123
|
 | "rhino" behavior in, 107, 108, 111
|
 | scars and manly image, 72
|
 | smiling and, 69, 69 n , 128, 157, 158159, 162
|
 | social dominance and, 198199
|
 | spatial skills, 5158
|
 | testosterone levels across the life span, 1516, 16 , 17
|
 | testosterone levels, various population groups, 17, 17
|
 | thinking and testosterone, 4243
|
 | verbal skills, 42, 4647
|
 | Mental rotation tests, 53
|
|