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Animal
6
Female
Male
Pregnancy
Rats
6
Support, Non-U.S. Gov't
endocrine system
rat
6
Estrus
4
Rats, Inbred Strains
4
Testosterone
4
animal experiment
4
prolactin
4
radioisotope
4
testosterone h 3
4
3 oxo 4 etienic acid
2
5alpha androstane 3alpha,17beta diol c 14
2
Aging
2
Body Weight
2
Castration
2
Cattle
2
Circadian Rhythm
2
Comparative Study
2
Depression, Chemical
2
Diestrus
2
English Abstract
2
Epididymis
2
Epitestosterone
2
Estradiol
2
Fertility
2
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