UTERINE BLEEDING OF MONKEYS IN RELATION TO NEURAL AND VASCULAR PROCESSES

Abstract

Transection of the spinal cord in 7 monkeys was followed, after an interval of 2-9 days, by bleeding from the uterus. The latent interval was shorter the lower the cord was divided, and the operative cycle, regarded as comprising the number of days from the 1st day of the last pre-operative cycle to the beginning of the 1st post-operative cycle, was considerably shorter than the mean length of the menstrual cycle in unoperated animals. The operative cycle was succeeded by the normal menstrual rhythm, but the uterus and ovaries underwent atrophic changes. Uterine bleeding did not occur when the operation was performed on a castrated female.