Relation between the Secretion of FSH during the Periovulatory Period and Ovulation during the Next Cycle1

Abstract

Spontaneous contractions of the adult rabbit isolated testicular capsule were found to be influenced by moderate hyperthermic and hypothermic temperature changes. An increase in organ bath temperature from a normal scrotal temperature of 37°C to 42°C for an exposure period greater than 15 min resulted in irreversible changes in spontaneous contractions of the testicular capsule. However, complete recovery of spontaneous contractions, of the testicular capsule, which had been inhibited by an exposure of 40°C for 120 min, occurred when the tissue was returned to 37°C. In contrast, decreases in organ bath temperatures from 37°C to 32°C for up to 120 min produced a progressive increase in amplitude of contractions. Corresponding exposures of the isolated testicular capsule for the same time periods at 16°C resulted in complete but reversible cessation of spontaneous contractions.