摘要
Dear Editor, The newly revised World Health Organization （WHO） semen analysis manual provides the lower reference limits of semen parameters based on ＂the raw data from between about 400 and 1 900 semen samples, from recent fathers in eight countries on three continents＂： Australia, Europe and North America .
Dear Editor, The newly revised World Health Organization （WHO） semen analysis manual provides the lower reference limits of semen parameters based on ＂the raw data from between about 400 and 1 900 semen samples, from recent fathers in eight countries on three continents＂： Australia, Europe and North America .
