Interactive Tool: When Are You Most Fertile? - What does this tool measure?

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What does this tool measure?

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Click here to find out when you are most likely to get pregnant .

This interactive tool estimates your peak fertility period, also known as your "fertile window." This is when you are most likely to get pregnant. Do not use this tool to prevent pregnancy.

To find your peak fertility period, the tool first calculates the day you are most likely to ovulate. This is the day an ovary releases an egg. In the tool, you will enter the typical length of your menstrual cycle, and you will click on the first day of your last menstrual period.

To know how long your cycles are, track the number of days on a calendar for 2 or 3 months or cycles. Your menstrual cycle begins with the day your period starts and ends the day before your next period starts.
If you do not know the number of days in your menstrual cycle, you can use 28 days. This is the average length of a menstrual cycle. But if your cycle is longer or shorter than that, or if it is not always the same length, this tool will not predict your fertile window very well.

This calculator is meant to give you a rough estimate. Women usually ovulate at day 15, but it's also normal to ovulate well before or after the 15-day mark.

For information about reading your body's signs to tell when you will ovulate, see Fertility Awareness.

Author:	Sandy Jocoy, RN	Last Updated: October 31, 2008
Medical Review:	Sarah Marshall, MD - Family Medicine Kirtly Jones, MD - Obstetrics and Gynecology

This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions. © 1995-2009 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.

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Tuesday, December 15, 2009 10:04:33 AM

You are only fertile for about 5 days out of the month, so a rough estimate of your fertile window may not be very helpful if you are trying to conceive because it could be way off.

Even though an ovulation calculator is inaccurate, you can know exactly when you are most fertile if you check your two primary fertility signals: basal body temperature and cervical mucus consistency. And you don't have to pay anything to find out. You only have to invest a couple of minutes each day to know when you are most fertile.

I did some research for myself into these things and share exactly how to check your fertility signals in a special free e-report you can get from my website: When Are You Most Fertile

I even include a chart you can download and a quick guide to checking your fertility signals with pictures of what to look for.

We should all know our bodies well. One cool bonus is that when you check your fertility signals to know when you are most fertile, ovulation becomes the great highlight of your month, instead of your period.