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Animal
8
Female
Male
Pregnancy
Rats
8
endocrine system
rat
8
Support, Non-U.S. Gov't
6
animal experiment
6
Comparative Study
4
Estrus
4
Prolactin
4
Rats, Inbred Strains
4
Testosterone
4
estrogen
4
female
4
male
4
prolactin
4
radioisotope
4
testosterone h 3
4
3 oxo 4 etienic acid
2
4 aminobutyric acid
2
5alpha androstane 3alpha,17beta diol c 14
2
Aging
2
Aminooxyacetic Acid
2
Body Weight
2
Castration
2
Cattle
2
Circadian Rhythm
2
Depression, Chemical
2
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