Can i get pregnant on the "main" day of ovulation?

It's better to have sex a day or two before ovulation because it takes the sperm a little while to get to where the egg is, but it's difficult to predict exactly when ovulation occurs and it is certainly possible to get pregnant on your ovulation day. If you're trying to get pregnant, next month have sex at least every other day from the end of your period until you're sure ovulation has passed. If you're trying NOT to get pregnant, how about using a condom next time?