I can't believe that out of all the years of my life, biology classes, and sex education included that I finally learn about ovulation. I learned this after reading about the process of conception and how conception cannot happen unless an egg is present in the fallopian tube.

After the woman completes her menses the egg takes about 14 days to develop.

I assume that if you have sex after the woman completes her menses that she cannot get pregnant because the egg has still not developed.

So a man could enjoy sex with his wife without using a condom......