How to calculate the fertile period

It may seem obvious and simple, but is finding out when such a fertile period occurs is still a dilemma for many women? for those who want to get pregnant as soon as possible and for those who still want to avoid having a baby right now.

Other women still know more or less how to calculate when their fertile period occurs, but know little about it?

What, in fact, does this term mean? Does the woman usually have any symptoms during her fertile period? These and other questions will be clarified below.


What is fertile period?

Marcello Valle, MD, MD, director of the Origen Clinic, explains that the fertile period is the time of the menstrual cycle when sperm fertilization of the egg and thus pregnancy is most likely.

So, is the fertile period when women are most likely to become pregnant, as so-called ovulation occurs? when the ovary releases one or more eggs to be fertilized.

How to calculate the fertile period?

Marcello Valle explains that menstruation usually comes after 2 days of minor bleeding. It is from menstruation that the menstrual cycle should be counted. In a cycle with an average duration of 28 days, the woman can calculate her fertile period from the most likely date of ovulation, which will be on the 14th day of the cycle ?, says.


It is noteworthy that, in ovulation, the egg descends through the fallopian tubes and becomes available to sperm. But one must consider that the body is not a "machine", that is, just as not all women have a regular menstrual cycle (the same duration every month), the fertile period may not happen only in one day .

Thus, the woman and her partner must always be attentive to their intent:

  • If the desire is to get pregnant, the ideal time to have intercourse is 3 days before to 3 days after the expected day for ovulation.
  • However, if the desire is to avoid pregnancy, attention is needed, because even if intercourse occurs a day or two before the fertile period, the sperm can still "have the breath to fulfill its mission." This is because sperm can survive up to 72 hours after sexual intercourse.

Tip: Use the little table Baragosse to easily calculate your fertile period and plan accordingly.


It is worth remembering that the table starts with the first day of the menstrual cycle, ie the first day of menstruation.

Marcello Valle still warns. "The woman can get pregnant at any time of the cycle, but most likely is during the fertile period, which is usually between the 12th and 16th day of the cycle," he recalls.

Regulated menstrual cycles vs. unregulated menstrual cycles

As shown, for women with a regulated menstrual cycle, calculating the fertile period is not a difficult task.

But for women with unregulated menstrual cycles, calculating the fertile period is a challenge. ? In women with menstrual irregularity it is not possible to specify when will be the most likely day of ovulation and, therefore, calculating the fertile period becomes a difficult task ,? comments Marcello Valle.

It is noteworthy, however, that not having a 28-day menstrual cycle does not mean that there is anything wrong with a woman's body. Each organism works in a way. The important thing is to make routine consultations with a gynecologist who will advise, among other things, on the care a couple can take to avoid pregnancy, as well as what they can do to try to get pregnant, when they wish.

Symptoms During Fertile Period

This is another common question that often arises: Does the woman feel anything strange during her fertile period?

Marcello Valle points out that yes, that is, some symptoms related to this period may occur:

  • A slight rise in basal body temperature may occur;
  • Cervical mucus may become more fluid and noticeable;
  • Mild pelvic pain from ovulation may occur.

Tips for those who want to get pregnant

When a couple decides that they want to get pregnant it is hard to calm expectations! However, it is important for women to know that anxiety can hinder this process!

This is because, it is worth mentioning, the hypothalamus (brain area) regulates the menstrual cycle, but it also relates to the limbic system? which is exactly the origin and control of emotions.That is, if the emotion is unregulated, the ovulation stimulus is unregulated, and without proper ovulation, the woman does not become pregnant.

The couple wishing to become pregnant must have sex on strategic dates: the ideal period is around (3 days before to 3 days after) ovulation.

In the past it was believed that some positions during sexual intercourse could contribute to a woman's ability to get pregnant faster. However, doctors do not currently advocate any specific position. This is up to the couple, who may or may not have their beliefs.

A healthy diet with lots of fruits and vegetables is also important in the life of the woman who wants to get pregnant. In the case of even obese women, weight loss can help a lot. Therefore, the recommendation is always to consume low fat and low calorie foods. A nutritionist can also be a good ally in this period.

Girl x Boy

Leaving aside any kind of superstition, the question arises: Are there really any medical guidelines that can help the couple have a baby of the desired sex?

First, we must understand how a baby's gender is defined: it will be determined by the sperm that fertilizes the egg.

The woman only produces egg with x chromosome, while the man produces sperm x and y. Thus, when the egg is fertilized by sperm x, it results in a girl; when it is fertilized by sperm y, it results in a boy.

Within this idea, there are measures that can help the couple to conceive a baby of a certain sex. However, it is worth noting that they do not always work.

To get pregnant with a girl, the following factors are important:

  • Diets high in calcium and magnesium: milk, cheese, white beans and cereals;
  • Sexual intercourse two or three days before ovulation;
  • Ph vaginal acid.

For couples wishing to have a boy, the following factors are important:

  • Diets high in potassium and sodium: diet rich in meat and fish;
  • Sexual intercourse near ovulation or until later;
  • Alkaline vaginal ph.

Now you know all about the fertile period and also have good tips on getting pregnant as soon as possible! If this is your wish, remember to talk to your doctor about it, it is very important that he knows from the beginning the couple's desire to have a baby.

Female fertility animation (April 2024)


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