How To Calculate Ovulation For Irregular Periods

How to calculate ovulation for irregular periods? Calculating the ovulation period is very important to every woman because it determines the period of pregnancy.

Ovulation, which is the release of an egg from the ovary, usually occurs approximately 14 days before the next period.

It is the phase in a woman’s menstrual cycle when an unfertilized egg is released from the ovary and travels through the fallopian tubes and into the uterus.


This is the stage of the menstrual cycle during which pregnancy can occur if the released egg is fertilized by sperm. Read;How ampiclox help flush out sperm immediately after sex.

If you want to control pregnancy without using protection during sex, you have to be able to calculate your ovulation period.

Count the number of days from the first day of your period to the day before your next period to determine the length of your cycle. Then subtract that number by 14 to determine what day after your period you will ovulate.

For instance, if your average menstrual cycle is 30 days (although some are 28), you will ovulate 16 days after your period starts (30-14=16)

How can I calculate my ovulation period?

Calculate Menstrual Cycle

Young woman thinking with pen while working studying at her desk
Young woman thinking with pen

Make a note of when your next period starts. This is the first day of your cycle. Then, make note of when your period comes again in the following month. This is the beginning of the next cycle.

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When you count the days in between, this gives you the length of your cycle.

For accuracy, you might want to do this for more than one month, as menstrual cycles can vary in length from month to month.

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This will also help you determine if you have an irregular cycle, in which you may skip periods for a month or more at a time. An irregular cycle will make predicting ovulation more difficult.

Calculate When Ovulation Starts

Like earlier said, if you have a 30-day cycle, then ovulation will occur approximately on day 16 of your cycle.

Ovulation occurs between 10-14 days before your next period, so you will get an approximate ovulation date by subtracting 14 from the number of days in your cycle (eg. 30 days minus 14 = 16).

This means that ovulation will occur 16 days after your period starts. But what about irregular periods?

How To Calculate Ovulation For Irregular Periods?

So many  people find it cumbersome to manually track or calculate ovulation with irregular periods. Ovulation predictor kits and fertility monitors are tools that do the tracking or calculation for you. 

Unfortunately, with irregular periods, particularly those that are longer, you will probably have to do more testing month to month.

The Luteinizing Hormone (LH) is consistently detected in your urine. There is an increase in presence 24 to 48 hours prior to ovulation. 

NOTE: In women, LH helps control the menstrual cycle. It also triggers the release of an egg from the ovary. This is known as ovulation.

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An ovulation predictor kit detects this increase and lets you know that you are ovulating.  As ovulation predictor kits help you identify and confirm when you are ovulating, you should record these dates on your dairy or calendar.

Whether you look for patterns on the calendar or not, the information will be helpful to a fertility specialist or doctor if you find yourself encountering problems when trying to conceive.

Other ways to calculate your ovulation for irregular periods are;

1.Monitor Your Vaginal Discharge:

As you approach ovulation, your estrogen level increases. This triggers the release of fertile mucus to facilitate a possible encounter of the sperm and the egg. The process usually begins 6 days before ovulation. During this time, you may notice an increasing amount of moist and creamy discharge. When the discharge becomes clear and stretchy (egg white-like), you can be sure that you’re ovulating.

2.Track Your Basal Body Temperature: Basal body temperature (BBT) is your body’s temperature at rest, without any additional activities such as eating, working, moving, etc.

3.Calculate Based on Your Menstrual Cycles: If you have a regular cycle, ovulation is likely to occur 14 days before your next expected period. Since you won’t be able to pin down the exact day when you ovulate from this method, you need to add 5 days before and 4 days after this date to get a date range.

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