How to Identify The Timing of the Ovulation Day


If you want to have children and would like to know your most fertile period, you will need to measure your basal body temperature; then you’ll know when you’ll have the highest chance of getting pregnant. However, even if you measure the basal body temperature, it is meaningless if the timing is disturbed.

First we will talk about your fertile time.

Fertile Time is only 6 – 8 hours!

The sperm ejaculated at sexual intercourse is stored in the woman’s body for at least 48 hours.

Women’s eggs, on the other hand, have a much shorter life span. Previously, it was assumed that a woman is fertile for 1 day or 24 hours from the start of ovulation. However, in recent studies it is said that eggs have only 6 to 8 hours since ovulation occurred. Of course the duration also changes with the body, environment, age, and egg health.

In other words, in order for pregnancy to occur, it is necessary to fertilize the eggs between 6 and 8 hours after ovulation, so that it is better to store sperm in the body of a woman beforehand.

If you have intercourse the day before the scheduled ovulation day, even if the ovulation is delayed a day later than expected, the egg can still be fertilized with healthy sperm. In other words, in order to raise the probability of pregnancy, it is best to perform sexual intercourse every 48 hours from day to day.

Gynecologists are saying that there are many couples who perform an overwhelmingly high number of sexual intercourse compared to those who do it primarily because they want to have children. Aim to have intercourse once every 2 days.

So, when is the specific timing in a month? Here are three ways to check the timing.

Measure the Basal Body Temperature

Normally, basal body temperature is divided into two – “low temperature phase” and “high temperature phase”. And before the high temperature period, there is a day of “minimum body temperature” where the body temperature falls. Around two days later from the previous day’s lowest temperature – the lowest body temperature is said to be when ovulation is happening, and is the most fertile period.


In addition to identifying your most fertile period, the purpose of measuring the basal body temperature also signifies the state of your own body. When going to a hospital for an infertility consultation, basal body temperature is often measured first, so it is recommended to measure in advance.


It is not easy to grasp the timing if the basal body temperature is not stable, or when you are still starting to measure it.

Ovulation Test

There is a “pregnancy test drug” to check whether you are pregnant. An ovulation test medicine serves the same purpose to check for pregnancy by applying urine.

We measure the concentration of “luteinizing hormone” secreted just before ovulation and judge whether it is positive or negative according to its concentration. If it is positive, it is said that ovulation will occur within 24 to 36 hours from there.


It allows you to know when ovulation is going to occur a day earlier.


Does not test for ovulation, only the concentration luteinizing hormone that precedes ovulation. It cannot confirm that you have actually ovulated.

Ask the Gynecologist to Examine the Size of the Follicle

Ovulation check drugs are often used in combination with ovulation test drugs. The price differs depending on the type of examination and the number of passes.


Based on the size of the follicle, the doctor will identify your follicle and tell you about the timing, so you do not have to measure the basal body temperature yourself.

However some doctors may ask to submit the basic body temperature.


Although insurance can be applied at the beginning, if ovulation is properly occurring and one has experienced childbirth, it is not possible to apply insurance to the follicle check if the case does not conform to the definition of infertility.


Rather than rely on only one result, it may be more accurate to identify your most fertile period through your basal body temperature plus hospital findings regarding the state of your fertility. So, if you are thinking about getting pregnant, try all options available in this article. 

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