1. Reduced sperm yield from testicular biopsies of vasectomized men is due to increased apoptosis 
Deirdre A. O’Neill, M.Sc., Carmel M. McVicar, Ph,D., Neil McClure, F.R.C.O.G., Perry Maxwell, Ph.D., Inez Cooke, M.R.C.O.G., Katherine M. Pogue, B.Sc., Sheena E.M. Lewis, Ph.D. 
Fertility and Sterility 
Volume 87, Issue 4, Pages (April 2007)
DOI: /j.fertnstert
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

2. FIGURE 1
Immunopositive apoptotic marker staining in the seminiferous tubule. (A) Fas-positive primary spermatocyte. (B) Bax-positive cytoplasmic staining. (C) Bcl-2-positive leydig cell staining.
O’Neill. Sperm yield and apoptosis after vasectomy. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions

3. FIGURE 2
Correlation between testicular sperm DNA fragmentation and years since vasectomy (r = 0.40, P<.05).
O’Neill. Sperm yield and apoptosis after vasectomy. Fertil Steril 2007.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2007 American Society for Reproductive Medicine Terms and Conditions