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Produced lesions of the lateral hypothalamus (LH) in 25 pregnant and 25 nonpregnant Sprague-Dawley rats through chronically implanted electrodes to investigate the effect of LH damage on placentophagia. Other variables investigated were prior parturitional experience and stimulus properties of the placenta. Lesions were produced under either anesthesia 24 hr prior to parturition in pregnant Ss and 24 hr prior to placenta presentation in nonpregnant Ss. Lesions produced aphagia to a liquid diet. Pregnancy was not a significant variable in the initiation of placentophagia, but prior parturitional experience was critical. Virgin and primiparous Ss did not exhibit placentophagia following LH damage, but multiparous Ss would eat placenta whenever the opportunity arose, independently of LH damage and pregnancy. (18 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

Effects of lateral hypothalamic lesions on placentophagia in virgin, primiparous, and multiparous rats.