Uterine position and conditioned taste aversion


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Abstract

Three experiments investigated the influence of uterine position on the performance of female offspring of female Sprague-Dawley and male Long-Evans rats in a conditioned taste aversion paradigm. 49 females that had males caudal to them in the same uterine horn (MF), 48 females with no caudal males (FF), and 24 males that had occupied a variety of different positions in the uterine horn were examined. Exps I and II confirmed a differential behavioral response by males and females during acquisition and extinction of the conditioned taste aversion. However, no differences were found between MF and FF Ss. In Exp III, in which testosterone was administered to females throughout testing, MF females showed an increased sensitivity to testosterone and a more prolonged rate of extinction than FF females. Exposure to testosterone during prenatal development heightened postnatal responsiveness to testosterone in female Ss. Results are discussed in terms of the organizational and activational effects of testosterone on behavior in a conditioned taste aversion situation. (20 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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