Your ovaries release one egg every month somewhere around middle of your menstrual periods . This is called ovulation.
For most women, this happens nearly 2 weeks before the next expected menstrual period. Once released, the egg lurks around in your fallopian tubes for about 24 hrs, to be fertilized by your partner’s sperms, which survives for 3 or more days in your body. Having sex around this time increases your chances of getting pregnant .
Keeping an ovulation calendar is one easy way to track ovulation.
How to use an Ovulation Calendar?
- You need to record your menstrual cycle on a calendar for 8-12 months. This record, gives you a range of dates between which you are most fertile in the
coming months. The first day of bleeding is counted as the first day of your cycle.
- Since the length of your cycle may vary from month to month, you need to note the number of days it lasts every month. On an average, a menstrual
cycle lasts for 28 days, but can vary between 21-35 days.
- Subtract 18 from the total number of days in your shortest cycle. Take this new number and count ahead that many days from the first day of your next
period. Mark this date on your calendar, which tells your first fertile day.
- Subtract 11 from the total number of days in your longest cycle. Take this new number and count ahead that many days from the first day of your
next period. Mark this date on your calendar as your last fertile day.
- You are most fertile between 1st and the last fertile day that you calculate using the calendar method.
What’s Good about Ovulation Calendars?
- It is the least expensive and is least clumsy method of tracking ovulation. You don’t need buy costly test sticks every month, don’t need to invest in a thermometer, or don’t have to sneak out time from your busy schedule everyday to check on your cervical mucous.
What’s not so Good about the Calendar Method?
- It may be problematic to remember to write down so many dates and the length of the cycle.
- Although being the cheapest, it may not provide as reliable dates as the ovulation kits .
- Calendar method is not very effective if your cycles are not always the same length. If your cycles are very irregular sometimes lasting up to 45-60 days, or if you frequently skip your monthly cycles, then you might get a very wide range of dates between which you should be sexually active to conceive. This may not be practical and can be frustrating.