Ovulation Calculator

A lot of women have no idea when they have conceived, while others are able to tell the exact moment it happened. During ovulation, which usually happens mid-cycle (for example, on day 14 of a 28-day cycle), one of your eggs is carried into the nearest Fallopian tube. If your partner's sperm makes its way to the same spot within the next 12 to 24 hours, it may fertilize that egg. You are not actually pregnant until the fertilized ovum, called a zygote, travels the rest of the way down the Fallopian tube and attaches itself to the wall of your uterus. Since the average egg only lives for 24 hours and the average sperm lives for 24 to 48 hours, they have to be in contact within the first few hours after sex for you to conceive. In other words, to become pregnant, you should have sex at least every other day during the middle of your cycle. Use the following tool as a quick way to get an idea of when you ovulate. Please note that ovulation is a tricky thing to pinpoint.

NOTE: Many factors can affect the accuracy of this tool, including irregular menstrual cycles. This calculator should not be used as a method of preventing pregnancy.