Sleek, Fast and Focused: The Cells That Make Dad Dad

[obie7661]

http://www.nytimes.com/2007/06/12/science/12angi.html?ref=health

http://graphics8.nytimes.com/images/2007/06/12/health/13angl.xlarge1.jpg

[Mr.Deedee]

Added to that is the fact that a woman is fertile only 4 percent of her reproductive lifetime--when the mucus that is mentioned in the article is present. It's a wonder how any of ever got here!