1. Role of semen analysis in subfertile couples
Jan W. van der Steeg, Ph.D. M.D., Pieternel Steures, Ph.D. M.D., Marinus J.C. Eijkemans, Ph.D., J. Dik F. Habbema, Ph.D., Peter G.A. Hompes, Ph.D., M.D., Jan A.M. Kremer, M.D., Loes van der Leeuw-Harmsen, Ph.D., M.D., Patrick M.M. Bossuyt, Ph.D., Sjoerd Repping, Ph.D., Sherman J. Silber, Ph.D., M.D., Ben W.J. Mol, M.D., Fulco van der Veen, M.D. 
Fertility and Sterility 
Volume 95, Issue 3, Pages (March 2011)
DOI: /j.fertnstert
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Estimates of pregnancy rates and confidence intervals at 12 months for each subcategory of male subfertility based on the Kaplan-Meier estimator. Numbers above the bars are the couples per subgroup. Numbers above the estimated pregnancy rates are the estimated number of couples pregnant after 1 year.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Semen parameters and the probability of fathering a child. Spline functions: red vertical lines indicate the reference values for sperm quality according to the WHO manual of 1999; dotted lines represent 95% confidence intervals.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions