Calculate Ovulation Days: Ovulation Calculator


Get a personal calendar in which the phases of the cycle are marked - menstrual, follicular, ovulatory and luteal. You will see a forecast for the next three months - favorable days for conception. And even find out the estimated date of delivery!

The menstrual phase begins on the first day of menstruation. At this time, there is a rejection of the endometrium of the uterus (spotting), your body is preparing for the emergence of a new egg.

The follicular phase lasts on average about 10 days. During this period, maturation of the egg in the ovary occurs. This occurs under the influence of a special impulse, and follicle-stimulating hormone enters the ovaries. Thus, a new egg matures in the dominant (most important) follicle.

The ovulatory phase is the time when the maturation of the egg is completed. It is released from the follicle. It gradually moves to the fallopian tubes and is there for an average of 48 hours, awaiting fertilization. This time is considered favorable for ovulation, i.e. fertilization.

The luteal phase - the time when the follicle from which your egg is released, begins to produce progesterone. The hormone prepares the endometrium of the uterus for the so-called implantation of a fertilized egg (this marks the initial stage of pregnancy). The ovum enters the uterus and attaches there. A special hormone is produced - chorionic gonadotropin, or hCG. It is his indicator that indicates the occurrence of pregnancy. If fertilization has not occurred, then the egg cell and follicle die, the endometrium is destroyed and the cycle begins anew - on the first day of menstruation.

Knowing your days of ovulation, you can increase the chances for conceiving a child of a certain sex!
Find out your favorable days for conceiving a girl or boy.

You can calculate the day of ovulation not only using a calculator, but also in other ways

8 signs of ovulation that can be seen and felt

Ovulation test: types and instructions for use

We make the schedule of basal temperature and plan pregnancy!

Stimulation of ovulation: the benefits and side effects

Calculation of ovulation, menstrual cycle and days favorable for conception and pregnancy.

With this calculator you can calculate the days ovulation, ie when the probability of pregnancy is maximum and to determine the most favorable days for conceiving a child (boy or girl) without pharmacy ovulation tests for determining days of ovulation. The conception calendar helps women planning pregnancy calculate ovulation days and make personal conception calendar. You can schedule your female menstrual cycle for several months ahead! You will receive a menstrual calendar for 3 months which will include: ovulation day, days favorable for conception, days for conceiving a boy and a girl. Do not confuse the duration of menstruation (monthly) and the duration of the menstrual cycle! The ovulation calendar is interactive: hover the mouse on the day in the calendar and read additional information.

Topic of this page: ovulation calendar free, ovulation test, ovulation, ovulation schedule, the time of ovulation, how to calculate the "safe" days ?, can I get pregnant immediately after menstruation (you can!). Ovulation - the egg's readiness for fertilization - occurs approximately in the middle of the menstrual cycle. An egg cell can be fertilized for a short time, this period, which ranges from 12 hours to two days. All this time there is a movement of the female reproductive cell in the direction of the uterus, where the development of the future fetus should take place, it is at this stage that an encounter with male sperm should occur. Considering that spermatozoa, once in the fallopian tubes, can remain viable up to 5-7 days waiting for the egg, conception is possible even if sexual intercourse was a week before ovulation, and by the way, this day can be right after menstruation. The ovulation period is the most favorable time for conception.

How to calculate ovulation and determine the sex of the child.

One way to plan is to choose the right timing. conception - Shettles method (Shettles). This method is based on knowledge of the life expectancy of male spermatozoa in the female genital tract. The sperm can remain active for up to five days, so couples can conceive a child by having sexual intercourse before leaving the egg (ovulation). If you want a daughter, plan sexual intercourse a few days before ovulation, son plan sex 12 hours before ovulation. With irregular cycle should use other methods to determine ovulation, eg, BT (basal temperature). Please add this page to social networks and blogs.
You can also use alternative ovulation calculator.

Ovulation. How to calculate?

Ovulation - the egg's readiness for fertilization - occurs approximately in the middle of the menstrual cycle. If menstruation occurs every 28 days, then ovulation occurs approximately on day 14. If your cycle is shorter (for example, 21 days), or longer (approximately 35 days), ovulation can be expected at 8-11 or 16-18 days of the cycle, respectively. Our ovulation calculator will help you to accurately calculate the day of ovulation, and also show the probability of pregnancy on each day. Read carefully also the notes at the bottom of this page. The days of greatest fertility during each cycle (the days most likely to become pregnant as a result of unprotected sex) include ovulation day and days before that. These are the days of maximum fertility. High ability to conception also observed within a few days before. At this time you also have chances of getting pregnant. Outside this “fertility window,” lasting about six days, the chances of getting pregnant are very low.

You may also be interested in the Child Support Calculator or the online pregnancy test. You yourself can take a test on our website how many children there will be or just play in TETRIS. Return to the main page of the SuperIdi website.

Calculate ovulation online using a calculator

Specifying the date of the last menstruation in the ovulation calculator, its duration and the total duration of the cycle, you can view the days in which the probability of fertilization is high enough, as well as the days of ovulation when the probability of becoming pregnant is maximum. It is believed that to achieve pregnancy, the optimal frequency of sexual intercourse in the period before and after ovulation should be every 2 days. With more frequent sexual intercourse, sperm fertility decreases. The ovulation calculator will mark the most favorable days for you to conceive a boy or a girl and display the data on the screen in the form of a color calendar.

Registered users are available advanced features. You can change the parameters and adjust the calculator for you, namely: turn on the display of only the necessary items, store, change and view the history, browse the ovulation calendar back and forth for any number of months - the calendar will calculate your cycle based on the last saved data.

Ovulation, which you can calculate the day by filling in the appropriate fields, is a short period of time in the monthly cycle when the egg can be fertilized by a sperm cell.

It is useful for every woman to keep a calendar of menstruation with ovulation marks, to know about the variability of her cycle. Not only different women have a noticeable difference in the timing of the onset of ovulation, but even the same woman has the exact timing of the onset of ovulation in different months.

You can calculate the day of ovulation in several ways: by measuring the basal temperature during the entire menstrual period, you can determine it using the urine ovulation test, examining the cervical mucus or using a calendar method. Quite often, the occurrence of rare pulling pains in the lower abdomen on the one hand, as well as an increase in vaginal mucous discharge, indicate the approach of ovulation.

The day when ovulation occurs, you must be able to calculate the women of childbearing age, leading active sex life. For some women, this will help determine the time interval in which the conception of a child is most likely. Others knowing the ovulation date and “safe days” will help to avoid unwanted pregnancies, without using medical and mechanical contraceptives (calendar method of contraception). However, the use of a physiological method of contraception from pregnancy based on sexual abstinence during ovulation is ineffective with irregular periods.

Calculate the date of ovulation calendar method is not difficult, although it does not give one hundred percent guarantee. Ovulation occurs about 14-16 days before the next menstrual period. So with a 28-day cycle, ovulation occurs between the twelfth and sixteenth days (most often on day 14), counting from his first day of menstruation. Depending on the duration of the menstrual cycle, ovulation can occur between the eighth and sixteenth day, therefore, the period of possible fertilization of the egg by the sperm can be from the 8th to the 18th day.

Studies conducted at the National Institute of Medical Environmental Problems (North Carolina) have shown that not only the conception of the child, but also its gender depends on the time of conception relative to the time of ovulation.

How to calculate ovulation in a calendar way

  • Accuracy: below average.

This method works only if you keep a calendar of the menstrual cycle and know exactly the timing and duration of menstruation.

According to generally accepted medical concepts, ovulation occurs 14 days before the next menstrual period. With an average 28-day cycle, this date falls on the 14th day of the cycle. That is, the fertility window, taking into account the viability of spermatozoa, is the 10–14th days of the cycle.

But there is an opinion on the timing of the fertile window in the menstrual cycle: for many women, ovulation floats and may fall on any date between the 10th and 22nd day of the menstrual cycle. Only 221 women participated in the study, so it’s probably not worth extrapolating the results to everyone.

However, if you are not able to get pregnant in the “standard” fertility period, try expanding it in accordance with the new data.

Important note: the calendar method does not take into account individual characteristics and lifestyle. Do not rely on the calculations of the Rhythm method for natural family planning if you:

  1. Have an irregular monthly cycle.
  2. Became a mother a few months ago.
  3. Continue breastfeeding.
  4. Approaching menopause (this process, as a rule, starts with the age of 40–50 years).
  5. Recently stopped taking birth control pills or other hormonal contraceptives.

How to calculate ovulation online

  • Accuracy: below average.

Most web services are built on the same assumption that ovulation happens 14 days before the start of the next menstrual cycle. Therefore, they have the same drawbacks as the calendar method itself. Nevertheless, these services still can help determine the most fertile period.

For online calculation, you can use the ovulation calendar provided, for example, by the reputable medical WebMD website. Service will ask you:

  1. The date of the beginning of the previous menstruation.
  2. Cycle time If in doubt, the service will ask you to enter the start dates of several previous monthly periods and, based on them, will calculate the cycle itself.

As a result of calculations you will receive:

  1. Fertility Window.
  2. Estimated Ovulation Date (Approximate Ovulation).
  3. Estimated date of the next month (Next Period).
  4. The date when the pregnancy test will give an unambiguous result: whether it was conceived or not (Pregnancy Test Day).

How to calculate ovulation using applications

  • Accuracy: average.

Such utilities are not limited to using a purely calendar method. They study your individual cycle, state of health, emotional state, month after month, help to track down possible failures in the monthly process, including predicting the onset of ovulation and menstruation. The more data you enter into such an application, the more accurate the predictions will be.

Here is a small selection of popular female calendars.

This application allows you to fully track your health. It takes into account not only the monthly cycle, but also your individual characteristics: age, height, weight, sleep quality, amount of exercise, stress level, mood swings during the day, and so on. As a result, the date of ovulation is predicted fairly accurately.

How to calculate ovulation?

There is a very simple formula that allows you to calculate the day of ovulation at home without any additional devices. By the way, there are ready-made calculators for calculating online ovulation, which simplify the task, but there is nothing difficult in the calculations without that.

It was found that ovulation in any woman with any duration of the menstrual cycle occurs exactly 14 days before the next menstrual period. The duration of the first phase may vary, but the period after ovulation is constant. If menstruation occurs regularly in your “number to number”, then it will be easier to calculate the day of ovulation:

Ovulation Day = the date of the next month - 14 days.

When does it happen and how does ovulation occur?

Ovulation is the release of ripe eggs from the follicle into the cavity of the fallopian tube. This is where fertilization takes place if the sperm reaches its goal. It is important to understand that the life of an egg outside the ovaries is no more than 24 hours, so women who want to get pregnant should not miss this opportunity.

All girls and women who are sexually active and cannot become pregnant for a year, gynecologists recommend keeping an ovulation calendar, which allows, even with an error, to calculate the day of conception. This will help determine favorable days for conception and prepare for pregnancy in advance (3-4 days before the expected ovulation, you should abandon intimacy and follow a special diet).

To determine the day of ovulation, there are many methods. All of them have their pros and cons, so dwell on one thing is not worth it. After all, the more accurate the result, the greater the likelihood of pregnancy. So all the same on what day the ovulation comes?

Last month method

This method allows you to determine on which day after menstruation ovulation occurs. This is the easiest, but at the same time the most unreliable way to determine ovulation.

You can calculate a favorable date using a simple formula:

Day of the alleged menstruation - 14 days = ovulation.

In order to determine the expected day of the beginning of menstruation, you need to add to the first day of the last menstruation the average cycle time (from 27 to 37 days). From the received date, deduct 14 days - this will be the estimated date of ovulation.

March 1 - the first day of the last menstrual period.

28 days - cycle time

March 29 - the start of the next menstruation

Total: March 15 - the estimated day of thinning of the walls of the ovaries and the release of mature eggs, that is, ovulation.

Calendar method for determining a favorable day for conception

A slightly more accurate way to determine when exactly the favorable time for conception will come. To do this, you need to know all the cyclical dates for the past six months, even better - for the year. Next, you need to make calculations for the following algorithm:

  • Determine the duration of the longest and shortest cycles.
  • From the shortest one should subtract 18. The resulting figure will be the date of the beginning of the fertile (favorable) period.
  • From the longest subtract 11. The resulting figure will be the date of the end of the fertile period.
  • The interval between these values ​​is the period when the probability of conception increases by 50–70%.

If the cycle is intermittent, ovulation can be determined using other methods.

Basal Temperature Measurement

The basal temperature is the lowest temperature of the human body, which is measured during rest. It is necessary to measure it in the morning, before getting out of bed. The most optimal is to measure the temperature in the rectum (anus), although you can enter the thermometer into the oral cavity (under the tongue) or into the vagina.

When planning pregnancy measurements should be carried out at least three months. This is important for the accuracy of the data and the accuracy of the graph. The data should be recorded in a special notebook, it is desirable to keep a report in the form of a graph, so that you can visually record the curve of the rise and fall of values.

The thermometer should be held for at least 5 minutes, and measurements should be started from the 1st day of the cycle.

How to decipher the result?

  • During menstruation, the temperature will be quite high, after which it will decline (this usually happens by the middle of the cycle).
  • В момент овуляции базальные значения температуры резко поднимаются на 0,2–0,6 градуса. Такие значения могут продержаться до двух недель.
  • Перед следующими месячными показатели термометра вновь опустятся.

The lowest temperatures recorded before the next increase will be considered ovulation.

Ovulation tests - help to get pregnant

The most popular and fairly reliable method for determining ovulation.

The principle of operation of these tests is similar to similar strips for determining hCG, which are used in the delay, to confirm or exclude the likelihood of pregnancy.

The only difference is that test strips for ovulation determine the content in the urine of LH (luteinizing hormone), which reaches a maximum concentration 24 hours before leaving the eggs from the follicle cavity.

It is necessary to carry out these tests every day during the fertile period - only so the accuracy of the result obtained will be close to 98%.

Saliva Testing: Fern Method

At the time of ovulation increases the amount of female hormones - estrogen. Under their influence changes the composition of salivary secretions, in which the level of sodium chloride (salt) rises almost twice. If you put such saliva on the glass on the day of ovulation, then as it dries, you can see a picture that looks like fern leaves. Small crystals of salt form on the surface of the glass - this picture can be observed 72 hours before and after ovulation.

On sale there are special devices for carrying out similar testing. They are convenient and easy to use, and the accuracy of the results ranges from 90 to 96–97%.

Ultrasound monitoring

The most reliable method to accurately calculate the day of ovulation, to increase the likelihood of conception. Ultrasound monitoring (folliculogram) is the observation in dynamics of the growth and maturation of follicles and the expulsion of eggs.

This study is called monitoring, as it is monitored over time. This means that the frequency of examination with a transvaginal sensor is every day for the period necessary to establish a diagnosis or confirm the fact of ovulation.

This method is used in the treatment of infertility and IVF, as only with the help of the sensor it is possible to assess the state of the organs of the female reproductive system and determine whether there is a positive trend in response to ongoing therapy within the framework of artificial stimulation of ovulation.

Continuous monitoring is also necessary in case of polycystic ovary, and in some cases with this disease, the study can be carried out for 3 consecutive months (with two-week intervals).

What can be assessed using ultrasound monitoring:

  • growth and maturation of the dominant follicle on the eve of ovulation,
  • appearance of free fluid after ovulation,
  • destruction of the walls of the main follicle,
  • formation of the corpus luteum at the site of maturation of the dominant follicle.

The first time the patient should come to the study on day 6 of the cycle, in the future, the procedure will be repeated every day before the onset of ovulation. Control ultrasound should be carried out no later than 3 days after the date of leaving the eggs from the cavity of the dominant follicle.

Among these methods for determining ovulation, there is no such that would guarantee an accurate result 100%. Even with ultrasound monitoring, small errors are possible, since there is a human factor, and the probability of error cannot be completely excluded. However, using these methods, it is possible to increase the chances of a successful conception by at least half, so they should not be neglected.

Determine the concepts

So, ovulation is the period between the phases of the monthly cycle, lasting about two days. What is so special about this process that regularly occurs in the female body?

During ovulation, the egg (mature and formed) moves from the ovary to the uterus. If the egg is fertilized, it will be fixed on the walls of the uterus and will begin to develop. Therefore, women trying to get pregnant, you need to do the right calculations. Pregnancy, as well as ovulation, in each case occurs differently, individually, because it depends mainly on the menstruation cycle. Consider how the duration of this cycle is calculated.

How long is menstruation?

Ideally, the cycle should consist of 28 days. Monthly should be regular and last about 3-5 days, but in reality their duration can vary between 19-35, while the monthly cycle itself can take up to 9 days.

Menstruation is a complex process associated directly with hormonal balance. The slightest changes in balance, sudden changes caused by poor ecology, medication or stress, in any case affect ovulation and the day of conception.

Method number 4. Sensations and discharge

Sometimes the period of ovulation can be determined without resorting to any calculations. For some women, it’s enough to listen to your body. During this period can be observed:

  • short aching pain in the lower abdomen,
  • changes in vaginal discharge (they become viscous and more abundant),
  • breast augmentation
  • high sexual activity
  • mood swings.

During the ovulatory period, the discharge becomes abundant, transparent and viscous, reminiscent of egg white in consistency.

Method number 5. Online calendars

Today, many resources can use special programs to determine the most favorable time for conception. These programs are based on the so-called calendar method in contraception. According to them, if the menstruation cycle is normal, i.e. lasts 28 days, then 12-16 days from the beginning of menstruation are optimal.

To compile an individual ovulation calendar, enter the length of your menstruation cycle (usually 28 or 29 days) and the exact date of the last monthly periods in the required fields, then click the “Calculate” button.

Do not forget that the beginning of the cycle can be considered only the first day of menstruation.

Video - How to calculate ovulation and conception day

As you can see, the calculation of ovulation is not as complicated as it might seem at first glance. For this you only need to know:

  • the duration of the monthly cycle
  • date of the last critical days.

Determining the period of ovulation, you will know which days are suitable for conception, and which are safe for sex.

Table. Signs of ovulation, cycle, changes

Calculation of ovulation basal temperature

Basal temperature (BT) is the lowest body temperature observed during sleep. Measuring it, it is possible to easily determine ovulation, since it causes an increase in performance by 0.25-0.5 ° C.

Female hormones in different periods of the menstrual cycle has different temperature indicators. In the first phase, BT is kept low by the action of the hormone estrogen. These are ideal conditions for the maturation of the egg and its preparation for fertilization. The average temperature in the first phase is 36.3-36.5 ° C. It may slightly increase or decrease by 0.1 ° C. During ovulation, BT increases significantly, and averages 37.1-37.3 ° C. Such indicators will hold until the onset of menstruation. If the monthly has not come, and the temperature continues to stay at 37.1-37.3 ° C for more than 18 days after the delay, you can judge the occurrence of pregnancy.

To make the calculation of ovulation as accurately as possible should follow clear rules when measuring basal temperature:

  • Measurements are taken daily at the same time after sleep.
  • The same mercury thermometer is used, which should always be located next to the bed, since it is impossible to make sudden movements and get out of bed before measuring the basal temperature.
  • To measure the thermometer should be inserted into the anus and lie quietly for 5 minutes. After the time expires enter the indicator in the schedule.

To obtain the most accurate indicators, measure the basal temperature should be only after a long night's sleep, lasting at least 6 hours. Any violations of the rules in the measurement and many other factors (illness, evening sexual intercourse, medication, overwork, alcohol) can affect the performance. These factors are also indicated on the chart.

The schedule, compiled by all the rules, can show the onset of ovulation or its absence. When planning a pregnancy, the basal temperature is measured over 3-4 menstrual cycles. Thus it is possible to accurately calculate the day of ovulation.

The calculation of ovulation by ultrasound

By ultrasound (ultrasound) to calculate the release of the egg from the follicle as accurately as possible. Also, this method is suitable for women with irregular menstrual cycle. Thanks to the procedure, it is possible to track the development of the follicle and the moment when the egg cell leaves it. With a regular menstrual cycle, ultrasound starts to be performed 3-4 days before the expected date of ovulation. With an irregular cycle, the follicle begins to be observed 4–5 days after menstruation every 2–3 days.

Calculation of ovulation for test strips

It is possible to determine an auspicious day for conception with the help of special tests, which can be bought at any pharmacy. Test strips react to the urinary content of luteinizing hormone, which appears in it 24-36 hours before the follicle breaks and the egg leaves it.

With a regular cycle, tests begin to do 17 days before the start of the next menstruation. But with an irregular cycle, it will be difficult to find out the day of ovulation using the test, since it is impossible to determine the appropriate time for testing. In this case, it is better to turn to ultrasound monitoring.

Calculate the day of ovulation by discharge and sensation.

Some women can calculate the day of ovulation without any calculations. It is enough for them to listen to their own body. During the period of ovulation, women may experience non-lasting aching pain in the lower abdomen, swelling of the breast, mood changes, increased sexual desire, a change in the vaginal discharge (they become abundant and viscous).