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Female
Male
Rats
rat
139
nonhuman
117
animal experiment
111
article
105
female
97
male
91
Animals
88
priority journal
79
controlled study
77
Animal
71
animal tissue
53
Support, Non-U.S. Gov't
45
Rats, Sprague-Dawley
41
animal cell
41
Rats, Inbred Strains
38
endocrine system
36
Prolactin
32
Rats, Wistar
32
Pregnancy
28
animal model
28
sex difference
28
Animals, Newborn
27
central nervous system
26
Sex Characteristics
24
prolactin
24
radioisotope
24
testosterone
23
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