1. Fertility and Sterility
Efficacy and pregnancy outcome of two methods of semen preparation for intrauterine insemination: a prospective randomized study 
Mahmood Morshedi, Ph.D., Hakan E Duran, M.D., Steven Taylor, Ph.D., Sergio Oehninger, M.D. 
Fertility and Sterility 
Volume 79, Pages (June 2003)
DOI: /S (03)

2. FIGURE 1
(A) Cumulative pregnancy and ongoing pregnancy rates by number of IUI attempts. (B) Cumulative ongoing pregnancy rates according to the method of semen preparation by number of IUI attempts.
Marshedi. Intrauterine insemination, semen processing. Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )