If you have irregular periods, you might have a difficult time determining when you are ovulating. I ran into this problem myself when I was trying to conceive. My cycles were all over the map. One month, my cycle might run only 27 days, while the next month, it might run 36 days. This made it very hard to determine when I was ovulating.

When I first decided to go off birth control pills and tried to conceive, my OB-GYN told me to make sure we had intercourse two weeks after my period started. If my cycles had been exactly 28 days each month, ... more