1971 Press Photo St. Paul Genetic Lab technician John Olson examines sperm

Technician John Olson of the Genetic Lab, St. Paul, examines a sperm sample with a microscope connected to a high-resolution television screen. The examination reveals what proportion of the sperm are active so that the effect of the freezing can be determined when the sperm is thawed.

Photo is dated 1971.

Photo measures 10 x 8 inches.