title: Prolactin response to duration and wavelength of light in prepubertal bulls.
mesh_terms: D000818:Animals; D002417:Cattle; D002940:Circadian Rhythm; D003624:Darkness; D005453:Fluorescence; D008027:Light; D008297:Male; D011388:Prolactin / Q000097:blood*; D012741:Sexual Maturation
chemical_list: D011388:Prolactin