1. How reliable are results from the semen analysis?
Brooks A Keel, Ph.D., HCLD(ABB) 
Fertility and Sterility 
Volume 82, Issue 1, Pages (July 2004)
DOI: /j.fertnstert

2. FIGURE 1
Frequency distribution of 536 laboratories participating in a multicenter proficiency testing program and their chosen lower limits of normal for reporting sperm count (left) and motility (right). The hatched bars reflect the standard lower limit of normal for sperm count and motility according to the third edition of the World Health Organization laboratory manual (17). Data derived from Keel et al. (3).
Keel. Reliability of the semen analysis. Fertil Steril 2004.
Fertility and Sterility  , 41-44DOI: ( /j.fertnstert )