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Biology of Reproduction, Vol 22, 772-776, Copyright © 1980 by Society for the Study of Reproduction

Effect of Ovulation and Progesterone or Estrogen on the Responses of the Rabbit Oviduct to Nerve Stimulation

A. JOHNS 1, D. A. RADICKE 1, , and C. J. PAUERSTEIN 1

1 Department of Obstetrics and Gynecology, Center for Training in Reproductive Biology, San Antonio, Texas 78284


The effects of ovulation and estrogen or progesterone on the contractility of circular and longitudinal preparations of isthmus and ampulla of rabbit oviduct have been investigated. In the estrogen and human chorionic gonadotropin (hCG) treated group the isthmus was more sensitive to nerve stimulation at certain frequencies than it was in the other groups. Maximum tension to nerve stimulation at 26°C and to phenylephrine at 10°C was not significantly different between groups. The relaxation half-time to nerve stimulation at 26°C and to manganese at 10°C was not significantly different between groups. The data suggest that during either normal or altered ovum transport neither relaxation of the smooth muscle, sequestration of calcium nor maximum tension is altered. In the oviductal isthmus, the sensitivity of the tissue to nerve stimulation was increased by estrogen treatment.

Submitted on October 23, 1979
Accepted on January 11, 1980






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Copyright © 1980 by the Society for the Study of Reproduction.