Circadian rhythms, brain peptides, and reproduction.
D000818:Animals; D001923:Brain Chemistry; D002940:Circadian Rhythm; D004971:Estrus; D005260:Female; D006728:Hormones / Q000097:blood; D008297:Male; D008550:Melatonin / Q000378:metabolism; D018377:Neurotransmitter Agents / Q000502:physiology; D009929:Organ Size; D010455:Peptides / Q000502:physiology*; D010870:Pineal Gland / Q000502:physiology; D011247:Pregnancy; D012098:Reproduction; D013495:Supraoptic Nucleus / Q000502:physiology; D013737:Testis / Q000033:anatomy & histology
D006728:Hormones; D018377:Neurotransmitter Agents; D010455:Peptides; D008550:Melatonin