Are Sperm Counts Really Declining?
Physicians Raymond Bunge and C. M. Kinloch Nelson noticed something unusual happening at their Iowa clinic in the early 1970s: a growing number of men seeking infertility treatment. To investigate whether there might be changes in sperm in the general male population, they looked at sperm samples from 386 presumably fertile men—those seeking an elective vasectomy. Bunge and Nelson were shocked by their results: compared with men in the few studies prior, these men had lower semen volume, a higher quantity of abnormal…