Of approximately 2300 patients with cystic fibrosis seen in our clinic over the past 28 years, 115 males had reached 17 years of age or over as of January 1, 1968. Fifteen married, and 12 of these ...

Working with lab mice, the researchers froze epididymides, testicles, and entire animals for periods of 1 week to a year. They also used mice that had been frozen for up to 15 years.