UK scientists have created sperm from stem cells. (Well, we're not officially fucked since women have been able to reproduce pop shops (sperm banks).
http://cosmos.bcst.yahoo.com/up/player/popup/?rn=3906861&cl=14391202&ch=4226714&src=news
http://cosmos.bcst.yahoo.com/up/player/popup/?rn=3906861&cl=14391202&ch=4226714&src=news