Gap junctions: their presence and necessity in myometrium during parturition

RE Garfield, S Sims, EE Daniel - Science, 1977 - science.org
RE Garfield, S Sims, EE Daniel
Science, 1977science.org
Thin sections of longitudinal and circular muscle of myometrium obtained from rats during
pregnancy, at term, during delivery, and postpartum were quantitatively examined in the
electron microscope. Gap junctions (low resistance pathways) were only present during or
immediately prior to delivery and immediately postpartum. The absence of gap junctions
during gestation may be necessary for maintenance of pregnancy, while their occurrence
during parturition may lead to effective termination of pregnancy.
Thin sections of longitudinal and circular muscle of myometrium obtained from rats during pregnancy, at term, during delivery, and postpartum were quantitatively examined in the electron microscope. Gap junctions (low resistance pathways) were only present during or immediately prior to delivery and immediately postpartum. The absence of gap junctions during gestation may be necessary for maintenance of pregnancy, while their occurrence during parturition may lead to effective termination of pregnancy.
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