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      Reflexive Ovulation in the Rat, Induced by Caesarian Section, Is Blocked by Pelvic and/or Hypogastric Nerve Transection

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          Abstract

          Reflexive ovulation in the rat, induced by caesarian section performed on day 22 of pregnancy, was blocked by prior bilateral transection of the pelvic and/ or hypogastric nerves, which convey afferent activity from the reproductive tract. Tubal ova and hemorrhagic ovarian follicles were counted 24 h after bilateral nerve transections or sham neurectomy. Whereas the median numbers of ova and hemorrhagic follicles in the sham neurectomy group were 4.5 and 3.5, respectively, these values in each of the neurectomy groups were 0. The present findings indicate that caesarian section activates the pelvic and hypogastric nerves to trigger ovulation. This suggests that normally the rat is a spontaneous ovulator during the estrous cycle (nonpregnancy) phase of its reproductive cycle, and may become a reflexive ovulator at the parturient phase of its reproductive cycle.

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          Author and article information

          Journal
          NEN
          Neuroendocrinology
          10.1159/issn.0028-3835
          Neuroendocrinology
          S. Karger AG
          0028-3835
          1423-0194
          1992
          1992
          07 April 2008
          : 56
          : 3
          : 393-396
          Affiliations
          aDepartment of Psychology, Harvard University, Cambridge, Mass.; bInstitute of Animal Behavior, Rutgers -The State University, Newark, N.J., USA
          Article
          126254 Neuroendocrinology 1992;56:393–396
          10.1159/000126254
          1436377
          © 1992 S. Karger AG, Basel

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          Page count
          Pages: 4
          Categories
          Original Paper

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