Are worldwide sperm counts declining?

Affiliations

• ¹ University Department of Growth and Reproduction, University of Copenhagen, Copenhagen, Denmark.
• ² Department of Urology, Weill Cornell Medical College, New York, New York; Englander Institute for Precision Medicine, Weill Cornell Medical College, New York, New York; Center for Reproductive Genomics, Weill Cornell Medical College, New York, New York.
• ³ Braun School of Public Health and Community Medicine, Hadassah-Hebrew University, Jerusalem, Israel.
• ⁴ Division of Urology, Department of Surgery, University of Utah Health Science Center, Salt Lake City, Utah.
• ⁵ Department of Urology, University of California Los Angeles, Los Angeles, California.
• ⁶ Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, New York.
• ⁷ Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, California; Department of Urology, Stanford University School of Medicine, Stanford, California. Electronic address: eisenberg@stanford.edu.