Background Sperm counts have been steadily decreasing over the past five decades with
regional differences in the Western world. The reasons behind these trends are complex, but
numerous insights indicate that environmental and lifestyle factors are important players.
Objective To evaluate semen quality and male reproductive health in Switzerland. Materials
and methods A nationwide cross‐sectional study was conducted on 2523 young men
coming from all regions of Switzerland, recruited during military conscription. Semen …