Declining sperm quality in New Zealand over 20 years.
Shine Rebecca, Peek John, Birdsall Mary·The New Zealand medical journal
AIM: To investigate whether semen quality has changed in New Zealand over the last 20 years. METHOD: A retrospective study from 1987 to 2007. The sperm concentration, volume of seminal fluid, and the percentage of motile sperm were analysed from the first semen sample of 975 men presenting as sperm donors in Auckland…