Just remember that the length of time that is different in women's cycles is the first part of the cycle (before you ovulate). It is almost always about 14 days after that that you start your period. In other words, I have long cycles, around 44 or 45 days. I don't ovulate right in the middle. I ovulate right about day 30. I am not trying to confuse you, but I remember thinking all women ovulate right in the middle of their cycle, and that's not true. The only ones who do are those who have a 28 day cycle, and even then it can vary a couple of days or more. You could always try those home ovulation tests too. They are very accurate when performed correctly. They worked for me this time around, and I am pregnant down to the day that I thought we conceived.