1. Comparison of semen parameters in samples collected by masturbation at a clinic and at home 
Saad Elzanaty, M.D., Ph.D., Johan Malm, M.D., Ph.D. 
Fertility and Sterility 
Volume 89, Issue 6, Pages (June 2008)
DOI: /j.fertnstert
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
The proportion of men with abnormal semen values as defined by the World Health Organization guidelines: sperm concentration (<20 × 106/mL) and rapid progressive motility (<25%) in relation to place of sample collection. †,‡Significant differences in sperm concentration and rapid progressive motility, respectively.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions