This IT came from a girlfriend of mine that had been trying for some time to get pregnant (she’s also pregnant and due early next year). Upon further research, I added it to our regime.
Long periods of abstinence increase old sperm count in the semen, decreasing its ability to fertilize the egg. Having sex every two or three days refreshes semen, resulting in better sperm quality.
We had what we called a “sperm dump day”. It was the first day in our 10-day method, when I knew I was several days away from ovulation. It was easy to add-on the extra day and I felt better about our sperm quality, therefore I felt better about getting the job done!
Some helpful links:
http://en.wikipedia.org/wiki/Semen_quality
http://www.wisegeek.com/how-can-i-improve-my-chances-of-pregnancy.htm
Baby Sherrill Makes 3! 