How accurate and how precise is your counting method?
A number is not always what it seems to be. What is the confidence interval? The Leja 100micron slide has two purposes. First, it can be used to determine azoospermia, and secondly it can be used to perform a post-vasectomy check. Accuracy is extremely important, this Leja slide gives you accuracy, precision, and speed!
Statistically speaking it is impossible to assess a concentration of zero. Therefore it seems impossible to determine azoospermia, since by definition there are no sperms. Due to the large, fixed volume of the chamber, the Leja method for determining azoospermia is the most accurate and reliable method to determine azoospermia and very low sperm count (0- 20,000/ml).
The Leja 100micron slide is the best way of getting a statistical meaningful result combined with speed.