Skip to content
WebMD: Better Information. Better Health.
Other search tools:Symptoms|Doctors|Videos

Ovulation Calculator

This calendar is a guide to help you track your ovulation day. Most women have 28-32 day cycles and ovulation can take place during days 11-21 of the menstrual cycle. These days represent average cycles; many women have slightly shorter cycles and ovulate earlier and others have longer monthly cycles with ovulation occurring later in the month.

For best results enter in the dates of the first day of your last three menstrual periods. If you can not remember these three dates, then enter in the first day of your last menstrual period.

Based on the average menstrual cycle of 28 days, your preceding menstrual period was on: (if this is incorrect, and you know the date feel free to change the date calculated below)

For even more accurate calculation a preceding date is needed: (if this is incorrect, and you know the date feel free to change the date calculated below)

Your menstrual cycle is approximately:
 
days long
Date of next period should be:
 
Fertility information:


begin significant fertility


end significant fertility
CAUTION: This calendar cannot and should not be used to prevent pregnancy.

Reviewed by Brunilda Nazario, MD on March 02, 2009

This tool does not provide medical advice. See additional information: Sources

© 2009 WebMD, LLC. All rights reserved.

webMD Video

Show or hide information about video: Prepare Your Body for Pregnancy   Prepare Your Body for Pregnancy

prepare_your_body_for_pregnancy.jpg

Keith Eddleman, MD, talks about changes you should make before trying to have a baby.

Watch Video: Prepare Your Body for Pregnancy (opens in a new window)

Show or hide information about video: Truth about Pregnancy Vitamins   Truth about Pregnancy Vitamins

Show or hide information about video: Preventing Multiple Pregnancies   Preventing Multiple Pregnancies

Show or hide information about video: Pregnant and Vegan?   Pregnant and Vegan?

Show or hide information about video: Dental Hygiene During Pregnancy   Dental Hygiene During Pregnancy

video library >