Medicine & Life Sciences
Birds
100%
Songbirds
55%
Testosterone
50%
Corticosterone
45%
Sparrows
45%
Breeding
40%
Columbidae
35%
Finches
28%
Food
25%
Ducks
24%
Photoperiod
22%
Music
20%
Gonadotropin-Releasing Hormone
20%
Opioid Receptors
19%
Luteinizing Hormone
19%
Naloxone
18%
Brain
17%
Injections
17%
Hormones
16%
Reproductive Behavior
16%
Dihydrotestosterone
15%
Coturnix
15%
Opiate Alkaloids
13%
Androgens
12%
Vasotocin
12%
Singing
11%
Testosterone Propionate
11%
Salamandridae
11%
Glucocorticoids
11%
Sexual Behavior
11%
Adrenocorticotropic Hormone
10%
Grief
9%
Opioid Analgesics
9%
Reproduction
9%
Amphibians
9%
Urbanization
8%
Steroids
8%
Gonadotropins
8%
High Vocal Center
8%
Ecosystem
8%
Genitalia
7%
Prolactin
7%
Drinking
6%
Apomorphine
6%
Testis
6%
Preoptic Area
6%
Vertebrates
6%
Temperature
6%
Glucose
6%
Androstane-3,17-diol
5%
Agriculture & Biology
testosterone
44%
birds
40%
corticosterone
36%
songbirds
20%
Junco hyemalis
20%
ducks
18%
hormones
17%
Carpodacus mexicanus
15%
luteinizing hormone
15%
injection
14%
Loxia
13%
Anas platyrhynchos
13%
Passeriformes
13%
deserts
13%
glucocorticoids
12%
breeding
12%
gonadotropin-releasing hormone
11%
Leucoptera
11%
stress response
11%
urbanization
10%
propionates
10%
corticotropin
10%
food availability
9%
Zenaida macroura
9%
androgens
9%
hemoparasites
8%
dihydrotestosterone
8%
brain
8%
mitotane
7%
Aimophila
7%
doves
7%
reproductive behavior
6%
metabolites
6%
molting
6%
reproductive system
6%
Toxostoma curvirostre
6%
social behavior
6%
uric acid
6%
adrenal cortex hormones
5%
breeding season
5%
secretion
5%
blood
5%
ambient temperature
5%
steroids
5%
gonadotropins
5%
glucose
5%