"The aim of the present study was to evaluate the characteristics and fertilizing potential of sperm obtained from nocturnal emission in men with psychogenic anejaculation. Our study included a small group of patients, and we were unable to supervise the course of the freezing procedures. Despite these limitations, it seems that the quality of the sperm specimens varies because in 50% of patients sperm concentrations were normal and in 33% motility was good."
January 1, 1970
https://en.wikiquote.org/wiki/Nocturnal_emission