title: Effects of photoperiod, absence of photic cues, and suprachiasmatic nucleus lesions on nocturnal prolactin surges in pregnant and pseudopregnant rats.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D004971:Estrus / Q000187:drug effects; D005260:Female; D007031:Hypothalamus / Q000502:physiology*; D007032:Hypothalamus, Anterior / Q000502:physiology*; D008027:Light; D011247:Pregnancy; D011270:Pregnancy, Animal; D011388:Prolactin / Q000097:blood / Q000378:metabolism* / Q000494:pharmacology; D011555:Pseudopregnancy; D051381:Rats
chemical_list: D011388:Prolactin