1. Relationship of paternal age with outcome of percutaneous epididymal sperm aspiration–intracytoplasmic sperm injection, in cases of congenital bilateral absence of the vas deferens 
Samir Elhanbly, M.D., Moustafa A. El-Saied, M.D., Mohamed Fawzy, M.D., Abdelaziz El-Refaeey, M.D., Taymour Mostafa, M.D. 
Fertility and Sterility 
Volume 104, Issue 3, Pages (September 2015)
DOI: /j.fertnstert
Copyright © 2015 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
A significant negative correlation is shown, of paternal age with retrieved-sperm count, sperm motility, sperm vitality, and normal sperm morphology.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2015 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
The ROC curve for retrieved-sperm count, obtained using percutaneous epididymal sperm aspiration and “take-home baby” results. ROC = receiver operating characteristic.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2015 American Society for Reproductive Medicine Terms and Conditions