Ovulation Period Online Calculator

How to calculate ovulation?

You can calculate ovulation for conceiving a child right now:

The duration of cycle
The duration of menstruation
  • Menstruation
  • Ovulation
  • High probability of conception
Indicate the first day of the last menstruation

Calculate your ovulation through an online calculator

Above the page is a calculator that will allow you to calculate ovulation online. The service will give you the opportunity to see the calendar for the next three months, in which the dates most favorable for conceiving a child will be marked.

You will need to enter the necessary information:

  • The date of the first day of the last menstruation;
  • The number of days of the menstrual cycle;
  • The duration of bleeding, that is, how many days the menstruation lasts.

After clicking on the date of the first day of the last menstrual period, the online ovulation calculator will display a calendar grid for the near future, in which days of different categories are marked with special colors:

  • Red - menstruation days;
  • Light green - the days of ovulation with a high degree of probability to conceive a baby;
  • Dark green - the day of ovulation with the maximum potential for fertilization of the egg;

Thus, the program allows young spouses who plan to replenish the family, calculate ovulation to conceive the long-awaited baby.

Favorable days for fertilization of an egg are called fertile. Women who decide to calculate the ovulation calendar in our calculator will receive fairly accurate and reliable data on fertile days in their body.

How does ovulation occur?

Ovulation is called the maturation of the egg in the female body within the biological cycle of the reproductive system. The maturation of the egg is its willingness to fertilize the sperm and, as a consequence, the birth of a new life inside the expectant mother.

Normally, in a woman's body, the menstrual period lasts from 28 to 35 days. The starting point of this cycle is the first day of menstruation. The finish point is the first day of the next menstruation. Ovulation usually occurs in the middle of this cycle. If the menstrual cycle is 28 days, then on the 14th day. However, seven days are considered fertile (or favorable for conception): 1-2 days before ovulation, ovulation itself, 1-2 days after it.

If fertilization does not occur during this period, the mature egg cell simply dies.

Luteal phase (yellow body phase)

The menstrual cycle usually repeats every 28 days. On the first day of the cycle, a woman notices a spotting from the vagina. This cycle is a normal physiological process created by nature in order to enable women to become pregnant, bear and give birth to a baby.

Gynecologists distinguish three phases in the menstrual cycle:

  • Follicular phase;
  • Ovulatory phase;
  • Luteal phase.

When menstruation comes, the follicular phase begins. The uterus rejects the mucosal layer, prepared for the adoption of a fertilized egg, in the ovary begins the maturation of the new follicle. During this period, the hormones progesterone and estrogen decrease in the body. However, there is more hormone that stimulates follicle growth. This phase lasts approximately 13 days.

Then comes the ovulatory phase, which lasts only 48 hours. This period ends with the release of the egg, which can fertilize the sperm. At the moment, fertility is maximum.

Then comes the time of the luteal phase, or the phase of the corpus luteum, which will last about 2 weeks.

This phase can go into pregnancy, if at the previous stage the egg was fertilized successfully.

In the luteal phase, a yellow body is formed from a bursting follicle, which is the cells that generate progesterone - the necessary hormone to start pregnancy. During this period, the basal temperature increases, which will keep the corresponding indicators until the beginning of the next menstrual cycle, if the pregnancy has not begun. The corpus luteum is the main endocrine element of the ovary. Because without progesterone gestation is impossible.

The pituitary gland in a woman’s brain produces luteinizing hormone. It promotes the formation of granular cells of the ovarian follicle, which produce progesterone. The corpus luteum in the body of a woman is a temporary gland that exists only in the luteal phase of the menstrual cycle.

In the first 3 days of the yellow body phase, granular cells in the follicle cavity actively increase in size, capillaries appear between them. Each cell of the corpus luteum is saturated with blood vessels. In the yellow body the most active blood flow of the body takes place during this period.

3-4 days after the ovulatory phase, the generation of this unique blood supply system - the network of blood vessels in the corpus luteum - is completed. At this point, progesterone is most actively produced in the woman’s body.

If the fertilization of the egg does not occur, the generation of progesterone - the main function of the yellow body is completed on the 12th day after ovulation. The corpus luteum in this case is an endocrine gland of 1-1.5 cm in size, which is now entering the stage of reverse development.

Ways to calculate the ovulation calendar

Calendar method for calculating ovulation

Each female body has its own individual calendar of days with maximum fertility, that is, the days most favorable for sexual intercourse, which may result in fertilization of the egg with a sperm cell.

There is a calendar method for calculating ovulation - favorable days for conception. It is based on the features of the flow of the menstrual cycle in a particular woman. It is not difficult to calculate it in the event that the cycle is regular. For example, a girl knows for sure that her menstrual cycle lasts 30 days. In this case, 30 must be divided in half and subtracted 2 days. That is 15 minus 2.

Thus, on the 13th day after the first day of the last menstruation, a favorable period for conception occurs. Ovulation will be in our example on the 15th day, and fertile days begin on the 13th day of the cycle.

But this is only possible with a regular cycle that does not go astray. Such calculations will be inaccurate and ineffective in the menstrual cycle, which in a woman increases or decreases during the year.

Ovulation Test

You can calculate the day of ovulation in another way - to get an ovulation test at a pharmacy. The pharmaceutical market has a rich assortment of such tests. In the same way as the pregnancy test, the ovulation test should be immersed in the urine container and wait for the two strips to appear.

If in the pharmacy pregnancy test the markers of two bands are oriented to the presence of human chorionic gonadotropin (hCG) in the urine, then the luteinizing hormone (LH) markers are used in the ovulation test. With irregular menstruation, determining the exact date of ovulation by this method is not easy.

The calculation of ovulation according to physiological characteristics

In addition to all the above methods for calculating fertile days, there is a method that can be used independently (without the help of a specialist) by any girl. It is enough just to carefully observe your own body and trust Mother Nature.

To calculate the day of ovulation, there are a number of physiological signs:

  • The nature of vaginal discharge;
  • Soreness of the mammary glands;
  • Increased libido (sexual attraction to a partner);
  • Emotional irritability;
  • Discomfort in the lower abdomen;
  • Changes in well-being.

Let's tell about each sign in more detail.

In different phases of the cycle, which we talked about above, the expectant mother has different discharge. 1-2 days before the ovular phase, vaginal discharge is usually transparent, fluid (possibly, viscous), and in viscosity they look like egg white. In some cases, there may be a brown, bloody discharge during this period.

And in the follicular phase, vaginal discharge is of a different nature - creamy, sticky, or there is no discharge.

Sometimes a girl swells up her breast 1-2 days before ovulation, touching her nipples becomes painful. This is due to the increase in the level of progesterone in the woman's body, that is, hormonal adjustment.

Increased sexual attraction to the future father is due to nature itself, which makes it clear to the female body that now is the best time to conceive and then bear the child.

In one of the ovaries (left or right) the dominant follicle matures. This process on the day of ovulation may be accompanied by a pulling (like during menstruation) lower abdominal pain.

Basal Temperature

If your menstrual cycle is irregular, the most accurate picture of the fertile days can be determined using regular basal temperature measurements.

Within the phases of the menstrual cycle described above (follicular, ovulatory, luteal), in most cases, a woman has different basal temperature indicators. This is due to the change of dominant hormones in the body of the future mother. In the follicular phase, the basal temperature is usually low. In the ovulatory phase, the basal temperature rises to values from 37 to 37.3 degrees. This temperature is in the appropriate range of values before the onset of the new follicular phase.

In order for the method of measuring basal temperature to identify the most favorable days for conceiving to be effective, a woman should follow a number of recommendations:

  • Measurements are made rectally or vaginally for at least 5 minutes in a quiet supine position;
  • It is better if the thermometer is mercury, not electronic (the same for the entire measurement period);
  • Measurements should be made in the morning at the same hour, without leaving the bed, after a long night's sleep (the duration of which is at least six hours);
  • Measurements should be done for at least two months, recording the result every day.

Testing in the laboratory

Different methods for determining fertile days have a different degree of accuracy, because each female body is unique. Recall that the calculation of ovulation online in our calculator is one of the highly accurate and effective methods.

There is another method for calculating the days of ovulation for a long-awaited pregnancy, which we will now discuss.

At different stages of a woman's menstrual cycle, the content of a hormone changes in her body. In a modern laboratory (where everything is sterile and exactly as in a pharmacy) a girl who wants to get pregnant can be tested for the main female hormones.

  • Follicle-stimulating hormone (FSH) is increased by 3-5 days of the menstrual cycle;
  • Luteinizing hormone (LH) - increased by 3-8 or 21-23 days;
  • Prolactin - for 3-5 or 19-21 days;
  • Estradiol - on the 4-7th and 6-10 days;
  • Progesterone - on the 6-8th day.

The increased concentration of these hormones in the body, detected during laboratory tests, indicates to the gynecologist what phase or day of the cycle is taking place.

This allows you to accurately predict the day of ovulation and fertile days.

In addition, testing in the laboratory will allow doctors to identify a possible disease in the future mother and cure it in a timely manner.