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How to calculate the date of ovulation: what are the most fertile days to achieve pregnancy?

If you know your date of ovulation you can increase to a certain extent the chances of getting pregnant. But do you know how to calculate it? We give you some keys to know the answer.

The menstrual cycle is the preparation of a woman’s body for possible pregnancy. This period is divided into three phases, which always begin to count from the first day of menstruation to the beginning of the next. It usually lasts about 28 days, but it depends on each woman who understands more or fewer days.

In any case, the menstrual cycle is divided into three main phases that can be summarized as follows:

  •  The follicular phase, which lasts about 14 days. During these two weeks, a new egg begins to mature and the walls of the uterus prepare to welcome it.
  • Ovulation, which coincides approximately with day 14. At this stage the release of the egg, which travels through the fallopian tubes, where it will wait about 24 hours to be fertilized.

  • The luteal phase, which lasts about 14 days. It is the time interval between ovulation and the beginning of the next menstruation. During this phase, the ovum may or may not be fertilized, leading to preparation for pregnancy or the premenstrual stage.

How is the date of ovulation calculated?

To calculate the date of ovulation, it should be known that, although the cycles are more or less long for women, the luteal phase always lasts for 14 or 15 days. To find the date of ovulation, you must subtract these 14 days to the total of the average of your cycle. Also, Read about Male infertility.


Calculation of fertile days

To increase the probability of fertilization, you must extend the calculation a few days before and after the considered date: the ovum has a life of 24 hours and the sperm can last up to four days, which translates into a fertile period of about five days, which are placed just before ovulation.

How can ovulation be recognized?

Related: Can I get pregnant during my period?

There are some factors that may indicate that we are in the ovulation phase:

  •  If the basal temperature increases (taken in the morning on waking, before putting your feet on the floor) from 3 to 5 tenths.
  • If the cervical mucus becomes clear, it is more fluid and abundant.
  • If there are pains in the lower abdomen on the side of the ovary that releases the ovum.

Related: Is it pregnancy or Menstruation?

Ovulation tests

There are tests that are sold in pharmacies, similar to pregnancy tests (Read pregnancy test reliability) that allow you to detect if you are in ovulation period when the test strip is in contact with the urine (detects the presence of the hormone LH). If you want to have a baby, these tests can help you to know more precisely your most fertile days to conceive.

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