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Female
Male
rat
Rats
138
nonhuman
110
animal experiment
101
article
98
female
94
male
90
controlled study
74
Animals
73
priority journal
72
Animal
65
animal tissue
49
animal cell
42
Support, Non-U.S. Gov't
41
Rats, Sprague-Dawley
37
Rats, Inbred Strains
36
Rats, Wistar
30
endocrine system
30
Prolactin
28
sex difference
28
Pregnancy
24
animal model
24
Animals, Newborn
23
testosterone
23
Sex Characteristics
22
radioisotope
22
Luteinizing Hormone
21
luteinizing hormone
21
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