1. Influence of a short or long abstinence period on semen parameters in the ejaculate of patients with nonobstructive azoospermia 
Arieh Raziel, M.D., Shevach Friedler, M.D., Morey Schachter, M.D., Sarita Kaufman, Ana Omanski, Yigal Soffer, M.D., Raphael Ron-El, M.D. 
Fertility and Sterility 
Volume 76, Issue 3, Pages (September 2001)
DOI: /S (01)

2. FIGURE 1
Flow chart demonstrating the impact of the order of testing on extended sperm preparation (ESP) results.
Raziel. Abstinence period and ESP results. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )