Abstract
Direct stimulation of the pelvic parasympathetic nerves of 4 nonpregnant and 20 gravid ewes between 51 and 136 days' gestation caused no change in uterine vascular conductance. Similarly, surgical and pharmacologic pelvic parasympatholysis caused minimal or nonsignificant changes in uterine conductance and uterine blood flow. These results suggest that parasympathetic uterine vascular innervation is absent in the ewe.
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