| See also Evolution; Natural selection; Reproduction; Sexual selection.
|
| adolescence and adulthood, 1519
|
| age and levels of, 7980, 80 , 99
|
| amount produced in body, 8
|
| animal experiments with, 6869
|
| cellular activity and, 10
|
| Class III controlled substance, 87
|
| detecting presence of, 78
|
| discovery, historic, 214
|
| environmental and phytochemical, 1819
|
| estrogen created from, 89, 10
|
| evolution and levels of, 3536
|
| fetus and, 1115, 25, 121
|
|