Serum prolactin concentrations and the initiation of maternal behavior in the rat.
D000818:Animals; D001522:Behavior, Animal; D002369:Castration; D005260:Female; D008425:Maternal Behavior; D010053:Ovary / Q000502:physiology; D011247:Pregnancy; D011388:Prolactin / Q000097:blood*; D011863:Radioimmunoassay; D051381:Rats; D013997:Time Factors; D014626:Vaginal Smears
D011388:Prolactin