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Animal
12
Pineal Gland
Support, Non-U.S. Gov't
endocrine system
pineal body
12
pineal gland
Female
10
Rats
10
central nervous system
10
Rats, Inbred Strains
8
animal experiment
8
rat
8
Male
6
estradiol
6
melatonin
6
nonhuman
6
progesterone
6
Brain
4
Ganglia, Sympathetic
4
Luteinizing Hormone
4
Melatonin
4
Sex Maturation
4
animal cell
4
gonadorelin
4
photoperiodicity
4
puberty
4
radioisotope
4
reproduction
4
review
4
superior cervical ganglion
4
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