In many situations, timing is everything. For example, if you spend enough time star gazing, you just might catch a glimpse of a shooting star. Of course, if you happen to be watching during a meteor shower, you've just raised your odds of seeing something spectacular. Similarly, trying to conceive a child by making love randomly may be great fun – but your chances of adding another life to the universe are improved if you know when to shoot for the moon.

From The Art of Tracking Your Fertility

There are only a few days during each menstrual cycle when you can conceive, yet most people have an 85 percent chance of getting pregnant within one year of trying. And by having intercourse on your estimated fertile days, you can increase your chances of getting pregnant.

Every woman's menstrual cycle is unique — it takes a little investigation to understand your own. There are several ways to determine when you are fertile: basal body temperatures, cervical mucus, ovulation predictor kits and the calendar method, to name a few. Often, the first method people try is the calendar method. For women with regular cycles, this method is a simple and effective option. With this in mind, iParenting.com presents our calendar-based Ovulation Calculator.

Tell us the date of your last menstrual period, and we'll tell you when you could be most fertile during the next three months. This tool also tells you when a baby conceived during any of these cycles would be due, and which celebrities and notables could share your baby's birthday!