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Charting & Tracking Fertility

Ovulation Calculator

What Day Do You Ovulate?

It takes a little investigation to understand your menstrual cycle. There are several ways to determine when you are fertile: basal body temperatures, cervical mucous, ovulation predictor kits and the calendar method, to name a few. If you have regular cycles, the calendar method is a simple option.

Enter the date of your last menstrual period, and the calculator will reveal 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!


First Day Of Last Menstrual Cycle*:

Month:
Day:
Year:

Average Length Of Your Cycle**: Days

Ovulation Calculator-What Day Do You Ovulate?

Tips:
* The first day of your last menstrual cycle is the day your period begins to flow. Pre-menstruation spotting is not considered the beginning of your period.

** The average length of your cycle is the number of days from the first day of your period up to (and including) the day before your next period begins. Your personal average can be calculated based on your cycle length during the past several months. If you don't know the average length of your cycle, enter 28 days as this is considered average.

WHAT PEOPLE ARE SAYING ABOUT...
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Anonymous says
2 weeks, 5 days ago

if i had my period first week december, had sex during christmas holiday, how far along pergnant am i? is it form time i had sex or doe sit actually start before then?

Anonymous says
December 31, 2009

If I have a 25-day cycle and have unprotected sex on 12/30, LMP was 12/19, could I get pregnant?

Anonymous says
November 25, 2009

If I had my period on the 3rd of November what day should I ovulate? and if I had sex on the 10th - 16th, 21st, 22nd, 24th & 25th (today) could i be pregnant?

Anonymous says
September 23, 2009

how many days before and after menustral cycle should ovulation take place?

Anonymous says
September 16, 2009

if i had sex the day i was off my period and then 9 days later and became pregnant. Which day did i get pregnant? As of july 10th i was 4 weeks pregnanat?

Content provided on this site is for educational purposes only and should not be construed to be medical advice, diagnosis or treatment.
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