Boots WebMD Partners in Health
Return To Boots

Pregnancy health centre

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't remember these three dates, then enter in the first day of your last menstrual period.

The beginning of 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)

Menstrual period before the above:

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)

Preceding menstrual period: (approximately 3 months ago)

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

Fertility information:


high fertility
begin significant fertility

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

Parenting newsletter

Tips to inspire healthy habits.
Sign Up Now!

Popular slideshows & tools on BootsWebMD

woman coughing
Home remedies for coughing
smiling baby
Causes and remedies
man holding sore neck
16 tips when you have a lot of weight to lose
mother and child
Caring for a baby with cows' milk allergy
woman holding mouth
What causes sensitive teeth?
man holding sore neck
8 signs you're headed for menopause
man holding sore neck
The best time to do everything
bain illustration
Best foods for your brain
woman doing situps
7 most effective exercises
avacado on whole wheat crackers
Plenty to choose from
egg in cup
Surprising things that can harm your liver