If you have been charting your cycle as part of your ttc (trying to conceive) plan, you may also be keeping track of your CM (cervical mucus). Although it is not exactly dinner table conversation, it could be the key to figuring out your ovulation day each month!
You can check your CM by either using a piece of toilet paper or just looking at the inside of your underwear. What you will notice is that throughout your cycle, your CM changes in a couple of different ways.
After your period, your CM tends to be dry or sticky. However the closer you get to ovulation, the wetter it will become. Eventually it will become VERY wet and stretchy, kind of like egg whites. This is your body's way of telling you that you are just about to ovulate. This is also when you are most fertile, so when this happens you want to take full advantage of this time!
As with everything, all women are different and so are their cycles. If you do not produce much CM, you may want to check with your doctor.