ovulation and fertilization

How To Calculate Ovulation

Ovulation is when an egg that is released from a woman’s ovaries travels through her Fallopian tubes to her womb. The egg lives for about two days and dies if not fertilized by the sperm. For most women, ovulation happens once every month. Knowing the signs of ovulation is key to getting pregnant or avoiding pregnancy.


Signs of Ovulation

How long does ovulation last?

learn how to track your basal body temperature

How to calculate menstrual cycle

Which day of my menstrual cycle is my ovulation?

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It is important for women desirous of conceiving to know the signs of ovulation. This is because during ovulation, a woman’s most fertile and is highly likely to conceive she has sex in this period. Therefore, knowing the signs of ovulation puts you in charge of your fertility.


For especially older women, knowing the signs of ovulation helps you to know when your chance of conceiving is highest.


For those wanting to use “timing” to determine the gender of their babies, knowing the signs of ovulation is key. Same goes for those who have unprotected sex but do not want to get pregnant.


If your menstrual cycle is longer than 26 days, an easy way to calculate ovulation is this: You will ovulate 14 days before your next period shows up. If you know when to expect your next period, 14 days prior to that next period is your ovulation date.


However, some women have irregular menstrual cycles that often differ in length. It will be inaccurate for such women to calculate ovulation date using the calendar method or by counting 14 days before the next period. Same goes with women whose cycles are shorter than 27 days.


Therefore, understanding the signs of ovulation helps these categories of women to spot ovulation dates through changes in their bodies or what you may call bodily signs.


Signs of Ovulation

  • Egg white cervical mucus

As you near ovulation, your vaginal mucus becomes stretchy and clear, like egg white, this happens in most women. The quantity of the mucus, what it looks and feels like is not exactly the same for all women. To test it for ovulation, remove some of your vaginal mucus  with your finger and stretch it out between your thumb and finger. If you notice what is described here, you are likely in a fertile phase of your menstrual cycle.


  • Breast and nipple sensitivity, tenderness or soreness is another common sign of ovulation


  • Mild pelvic or lower abdominal pain

Some women experience a mild ache or pain in the lower abdomen. This can last for a few minutes or a few hours.


  • Light spotting (light bleeding from the vagina)


  • Increased libido

For some women, their sex drive increases during ovulation


  • During ovulation, your cervix (that connects the vagina to the womb) may become softer and more open.


  • Slight increase in basal body temperature

By tracking your basal body temperature each day, you may be able to predict when you’ll ovulate.

How to track your basal body temperature

Take your body temperature at the same time every morning before you get up to use the bathroom in the morning.

During ovulation, there will be a Slight increase in basal body temperature.

It requires that you have a regular sleeping habit and that you don’t do work night shifts.

You can use Free apps and websites to chart your basal body temperature


  • Finally, you can also purchase an ovulation prediction kit. Using it will help you determine your ovulation days without complex calculations.

for how to calculate menstrual cycle check this out

It is also helpful to understand your menstrual cycle while trying to know the signs of ovulation. Your menstrual cycle gives you a rough estimate of when to look out for the signs of ovulation.


How long does ovulation last?

Ovulation lasts for between 12 to 48 hours.


How to calculate menstrual cycle

A woman’s menstrual cycle begins from the first day of the menstrual bleeding to the 1st day of the next menstrual bleeding. Like I mentioned earlier, that is an average of 28 to 32 days for most women.


Counting from the 1st day of menstrual bleeding, some women can ovulate between the 11th to the 21st day of the menstrual cycle. These days are referred to as the fertility window.


Take note of the first day of your period (day 1). Then note the first day of your next period. Count how many days you have between the first days of each period. You must take note of at least 6 cycles to get an accurate result.


Let me give you a practical illustration with the table below:

First Day of Period Number of Days in Cycle
Jan 1
Jan 30 29 days
Feb 29 29 days
Mar 29 29 days
April 27 29 days
May 23 26 days
June 21 28 days
July 21 30 days



Which day of my menstrual cycle is my ovulation?

Once you become familiar with your menstrual calendar, you can more easily track your days of ovulation.

However, ovulation days differ for women, it will take place any time between the 11th day and the 19th day of your menstrual cycle. Therefore, you will ovulate between the 11th and the 19th day after you see your period. 


Further reading on how to calculate ovulation


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