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Ovulation Calculator

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The fair sex, on the one hand, it is easy to get pregnant, but on the other - it is difficult. Why is there such a duality? Let us turn to physiology. A woman at reproductive age ovulation happens every month around the middle of the cycle. This term refers to the release of a mature egg from the ovary. This process takes only 1-2 days.

Many people, having read the text written above, will probably think that getting pregnant is very simple - you just need to calculate the day of ovulation, and have sex with a partner before and after it. However, things are not as simple as they seem. If it were possible to get pregnant strictly in the middle of the cycle, there would be no unwanted pregnancies and women who dream of a child but cannot become pregnant for some reason.

What days it is impossible to conceive a crumb?

Women who have chosen the calendar method of contraception and who have refused other means of protection (condoms, various drugs), will grieve, because there are no absolutely safe days. You can get pregnant at any time. It is necessary to take into account only the fact that in some days the chances of conceiving a baby are great, and on other days they are significantly reduced. There are no periods with zero probability.

A relatively "safe" time can be considered a couple of days before menstruation and a couple of days after them. To calculate the "dangerous" days, you need to know the duration of the menstrual cycle. It must be stable - this is the main condition.

With a 28-30-day menstrual cycle, the highest chances of conception occur at 14-15 days, since ovulation occurs around this time. There are also possible deviations for a number of reasons: due to nervous breakdowns, stress, the presence of diseases, the use of drugs.

How to calculate without errors, on what days you can get pregnant?

Calculate the days in which you can conceive a child is not so simple. To do this, you need to analyze the entire menstrual cycle, taking data for the last 6-12 months. If hormonal contraceptives were used at this time, the results of the calculation may be incorrect.

In order not to forget which days are monthly, should have a special calendar. If the menstrual cycle is not regular, then determine which days you can get pregnant will not work. In such cases it is best to use other methods for calculating favorable periods for conception.

If during the time period under study there are minor deviations, then the following step-by-step calculation can be made:

  1. Select the longest and shortest menstrual cycles for 6-12 months,
  2. Take away the number 18 from the number of days of the short cycle. The result obtained is the day from which the period begins with a high probability of becoming pregnant. For example, the shortest cycle is 25 days. Having taken 18, we end up with the number 7. Hence, the favorable period for conception begins from the 7th day of the menstrual cycle,
  3. Subtract the number 11 from the number of days of the longest period. The result is the day that ends the period with a high probability of becoming pregnant. For example, the longest cycle is 29 days. Having taken 11, we get the number 18. Thus, on the 18th day of the menstrual cycle, the favorable period for conception ends,

From this example it can be seen that the highest probability of getting pregnant is between the 7th and the 18th day.

Is it possible to conceive before menstruation?

An unequivocal answer to this question can not be given. Conception may or may not happen. First, we will understand why the above question can be answered in the negative.

As you know, ovulation occurs in the middle of the cycle. Before the beginning of the monthly egg cell dies. If ovulation occurs much later or again, then an interesting situation may not come, as the hormonal background of the woman will be tuned to a new cycle.

Now we will explain why conception can occur before menstruation. In healthy women who have an irregular sex life, the chance of becoming pregnant is quite high. Conception can occur after any sexual intercourse.

The body can respond to such a rare event by unplanned ovulation. She can provoke and substances contained in the semen. Women who regularly have sex with a regular partner may not face this.

Is it possible to conceive during menstruation?

Pregnancy during the first days of menstruation is unlikely. This is due to an unfavorable environment for sperm cells and for implantation of the embryo (abundant secretion of blood). However, "surprises" from nature should not be excluded.

Conception during an unfavorable period can occur in the following cases:

  • with prolonged menstruation (for example, it may take less than a week before ovulation, and then the sperm will wait for the ripe egg to come out),
  • due to menstrual irregularities caused by diseases, infections, exercise, stress,
  • in case of incorrect calculation of the period of safe sex (due to the irregularity of the menstrual cycle).

Is it possible to conceive immediately after menstruation?

Many women say that it is impossible to get pregnant for several days after the end of menstruation. Doctors do not hold this point of view. They warn that at any time you can get pregnant.

Spermatozoa, getting into the female genital tract, can remain viable and active for several days. If the menstrual cycle is short and the menstrual period is long, then the probability of getting pregnant will be high. Sexual intercourse can take place during the most favorable days for conception.

Pregnancy immediately after menstruation may occur for the following reasons:

  • because of the ability of sperm to maintain their activity for several days,
  • due to the maturation of several eggs in one menstrual cycle,
  • due to a shift in ovulation time. It can occur not in the middle of the menstrual cycle, but much earlier or later. The “culprit” of such disorders in young girls is the irregularity of the menstrual cycle, and in adult women hormonal abnormalities.

Based on this, we can say that the calendar method is not a reliable means of contraception. For some women, it is not suitable at all. Read more about when you can get pregnant after menstruation →

When can you get pregnant with the greatest probability: how to determine

Calculate the most favorable days for conception can not only using the calendar method. There are several other more effective ways:

  1. Determination of basal temperature
  2. Ovulation tests,
  3. Folliculometry,
  4. Subjective feelings.

1. Determination of basal temperature

To calculate the period when the probability of conceiving a child is high, it is necessary from the beginning of the menstrual cycle (from the 1st day of menstruation) every morning after waking up to measure the basal temperature in the anus.

Errors can occur for several reasons:

  • due to overwork or illness (during such periods the temperature is always elevated),
  • if a lot of alcohol was drunk before the measurement,
  • because of taking certain medications,
  • if sexual intercourse occurred 6 hours (or less) before the measurement,
  • due to lack of sleep.

You can learn about when ovulation occurs, if you carefully examine the schedule. At 12-16 days the basal temperature may slightly decrease. This will foreshadow the onset of ovulation in the coming hours. Here is what period you can get pregnant. At this time, women who dream of a baby should have sex.

2. Conducting ovulation tests

Modern and more accurate means of determining the release of the egg - tests for ovulation. They even look like tests with which you can learn about pregnancy. The result is shown in the form of 2 bars. The difference between the tests is only in the reagents. For example, in the means determining ovulation contains a substance that reacts to the presence of luteinizing hormone (LH), the level of which in the body rises 23-36 hours before ovulation.

In order not to miss the long-awaited event, you need to do tests every day and at the same time. After ovulation, the level of LH drops significantly, and then the strips begin to show a negative result. Manufacturers that produce tests for ovulation, put into the packaging a few strips. Due to this, this method of determining favorable days for conception is the most justified and convenient.

3. Folliculometry

It is very easy to diagnose the period during which you can get pregnant using ultrasound (Ultrasound). This method can not be called economical. It is suitable for women who want to conceive a child, but they cannot do it at all.

The ultrasound room is recommended to visit from the 10th day after the start of the last menstruation. Within a few days, the doctor will evaluate the growth of the dominant follicle in the ovary. When it reaches a size of 18-24 mm in diameter, an egg cell ready for fertilization will come out of it. Follicle formation may not lead to ovulation. It may not break, but regress. Such cases are rare, but have a place to be in real life.

The main signs of the onset of a favorable conception period, which the health worker sees on the monitor during an ultrasound scan, is the corpus luteum, which is in the ovary without a dominant follicle, as well as some fluid behind the uterus.

The quality of the endometrium affects the onset of pregnancy. It is known that a sperm-fertilized egg for subsequent development must be implanted in the uterine wall. If by the time of ovulation the endometrium does not reach a certain thickness, then the pregnancy will not come, as the fertilized egg cannot attach to the uterus and will die.

4. Subjective feelings

This method is not 100% reliable, but many women who are sensitive and attentive, manage to determine the days in which the probability of becoming pregnant is high. Every month sensations are repeated. If you listen to your body, you can draw some conclusions.

The most common signs of the onset of a favorable period for conception are:

  • the occurrence of pain in the lower abdomen or the location of one of the ovaries,
  • sudden increase in sexual appetite
  • heavy discharge from the vagina. They can easily be noticed by any experienced gynecologist. Discharges differ from the symptoms of infectious diseases. They are colorless and odorless. After 2-3 days, the discharge disappears without a trace until the next cycle.

The fair sex 1-2 times a year cycles called anovulatory. They represent a kind of "reset" of the female body. At this time it is impossible to get pregnant. These days can be determined very easily. Here are their main features:

  • there are no jumps when measuring basal temperature,
  • when conducting folliculometry, it is clear that the formation of a dominant follicle is not observed,
  • Ovulation tests show negative results throughout the entire menstrual cycle.

In conclusion, it is worth noting that the "reset" of the woman's body - an infrequent phenomenon. Thus, almost at least on what days you can get pregnant. If you conceive a baby does not work, then do not lose hope. Getting pregnant is difficult and easy at the same time, if you look at it from 2 different sides. The main thing is to have a desire. If it does not go anywhere, then the dream will certainly come true.

On the use of ovulation calculator and conception online

The ovulation calculator is one of the ways to determine the most favorable days for conceiving a child. After all, it is not always easy to conceive a child even to an absolutely healthy couple, if you do not “get” on an auspicious day, then pregnancy will not come. Someone carries more and pregnancy comes quickly, and someone has to wait for several months. Our ovulation and conception calculator will help you calculate that time.

But keep in mind that the results may not be entirely reliable. The female body is very mysterious, and sometimes it is not quite understandable medicine phenomenon. For example, ovulation can occur closer to the end of the menstrual cycle, or vice versa in its first third (whereas it should be exactly in the middle). On the Internet, there are often stories of women who claim to have become pregnant on days that are absolutely safe in terms of likely conception. So, the ovulation calculator online as an independent contraceptive should not be considered. It is useful as an additional tool for certain categories of women.

As you know, today the most effective, effective means of contraception are the combined hormonal pills and the Mirena helix. But, hormonal contraceptives, unfortunately, have a lot of contraindications and side effects. And not all healthy women are recommended to take them. For example, if a lady has only one healthy sexual partner, but sex life is not regular - 1-2 times a month, or even less often, then you can use safer methods - spermicides, and on dangerous days as a supplement - also condoms. Dangerous days can be determined by doing some calculations. You need to know the duration of your menstrual cycle. Moreover, if it is irregular, it is necessary first to calculate the average value, based on the last 6-12 months. Next, we calculate exactly the middle of the cycle. Thus, we get an approximate day of ovulation. We add a week before and a week after - the so-called dangerous time. Thus, half a month is “dangerous” for a woman, and half is relatively “safe”. If you do not want to count on a piece of paper and trust the program calculations anymore, our ovulation calculator is at your service - you can calculate favorable and unfavorable days for conception right now by entering some data.

Now about the more enjoyable - planning a pregnancy with the help of an online calendar. Here mistakes are not so terrible, even if they happen. With the help of the program presented on this page, you can calculate the days most likely for pregnancy to occur. This day is already 9, and even more! But with frequent sexual intercourse, the number of viable sperm cells becomes less, which means that the chances of conception are less. Better to save power. Therefore, we not only use the ovulation calculator online, but also practice the good old way - measuring the basal temperature. If material resources allow, we buy tests to determine ovulation. About the onset of ovulation says increased (above 37 degrees) basal temperature (taking into account possible factors other than pregnancy, which could give such a reaction) and a positive test for ovulation. You can also confirm the release of an egg from the ovary by ultrasound. There are also subjective signs, such as increased sexual desire, pain in the lower abdomen or from those involved in the process of the ovary and fallopian tube, the appearance of transparent, rather abundant vaginal discharge.

If you have only part of the evidence of ovulation present, and conception did not occur - do not worry. According to statistics, getting pregnant in the first 1-3 months of attempts is obtained from a very small number of couples. And doctors generally say that you need to start worrying if the pregnancy does not occur within more than 10-12 months of sexual activity without contraception. The fact is that the most auspicious day does not happen every menstrual cycle - so, the ovulation calculator is only half the battle. Psychologists recommend to achieve a quick result, just relax and stop counting, calculate, make love in certain postures and by the clock, etc. Stress affects our body too negatively. So if you are in a hurry to become parents, just go on vacation and enjoy each other's company! A printed calculator of ovulation and conception will then become for you one of the pleasant reminders associated with the period of planning a baby.

The ovulation and conception calculator allows you to calculate online ovulation days most favorable for pregnancy:

Menstrual cycle

There is a common misconception that a woman’s menstrual cycle should last exactly 28 days, and ovulation should take place “on the 14th day of the cycle” or “in the middle of the menstrual cycle”. This is not true.

In fact, the menstrual cycle is divided into two phases - the follicular (before ovulation) and luteal (after ovulation).

Luteal phase

The luteal phase (the phase of the corpus luteum) starts from the moment of ovulation and lasts about 12-16 days.

In place of the co-follicular follicle, a yellow body forms within a few days after ovulation. Its main function is the synthesis of progesterone and estrogen to support future pregnancies. Если беременность не наступает, то через 10-12 дней желтое тело подвергается обратному развитию, что приводит к падению уровня гормонов, после чего и начинается очередная менструация. Если беременность наступила – желтое тело продолжает функционировать и поддерживать беременность.

In the absence of pregnancy, the level of progesterone reaches its maximum value approximately one week after ovulation - at this time it is recommended to take a blood test for progesterone to assess the function of the corpus luteum.

The duration of the menstrual cycle

The follicular phase can differ in duration (both in different women and in one woman throughout her life). Usually the length of this particular phase of the cycle determines the length of the entire menstrual cycle and affects the delay of menstruation - for example, if follicle maturation occurs faster or slower than usual, or does not occur at all. The luteal phase usually has a constant duration (from 12 to 16 days).

Child sex

The sex of the future child does not depend on the location of the stars in the sky, the menu of the future parents or the position at conception. The sex of the child depends on which type of sperm fertilizes the egg cell - the male Y chromosome or the female X chromosome. Spermatozoa "male" sex, as a rule, easier and faster move, compared with the "female", but more sensitive to external conditions and adverse influences. Spermatozoa "female" sex, on the contrary, less mobile, but more hardy. Thus, if sexual intercourse takes place on the day of ovulation or later, the probability of a boy’s birth increases, and if sexual intercourse takes place long before ovulation, the probability of a girl’s birth increases and the probability of conception decreases. However, experts believe that the reliability of this method does not exceed 60%.

Determination of ovulation

The life of the egg is only a day or two, so it is considered preferable for effectiveness in conceiving a baby to have sexual intercourse that occurred during the period preceding the process of ovulation.

To determine the exact time of the onset of ovulation and, thus, calculate the favorable days it is necessary:

Make a personal schedule of the menstrual cycle

With a regular menstrual cycle, you can calculate the average period of the duration of the follicular and luteal phases, as well as specify the time of ovulation. For this you need:

  1. Enter in the table (calendar) the number of the beginning of the month,
  2. Mark regularly,
  3. Start a new entry from the first day of the next month.
  4. Maintain such a schedule for at least 3-4 months, to obtain the most accurate data. Keeping such a schedule helps determine the regularity of the menstrual cycle.

Use a basal temperature chart

This method is quite complex, moreover, the exact is not 100 percent. Its essence lies in the regular measurement of basal temperature (several months). Doctors have established such a temperature change (basal): 36.5-36.6 - the first half of the cycle, 36.0-36.2 - the period before ovulation, 37 and above - the second half of the cycle (ovulation). The method is very useful in calculating the favorable period for an irregular menstrual cycle.

It is not recommended to calculate favorable days for conceiving a child for women using any hormonal preparations. They can distort the results of temperature measurements.

The basal temperature should be measured in the morning, as soon as you wake up (not getting up from bed). The result will be accurate only when measured at rest, and not after movement. To do this, prepare a thermometer in the evening, put it next to the bed.

Mark changes in the cervix area

The cervix for the entire period of the menstrual cycle varies significantly (type, position). This method is able to determine the onset of ovulation. When performing it is necessary:

  • Pre wash your hands
  • Insert the middle finger inside the vagina, then grope the uterus,
  • Determine its location, humidity. Feel her condition (closed / ajar). The first time after menstruation, as well as several days after the ovulation process, the cervix remains closed, relatively dry and hard. During this period, it is located lower than usual. During fertilization, the cervix is ​​soft, moist, slightly ajar, raised slightly higher.

To test for ovulation in the middle of the menstrual cycle

The test is represented by strips that respond to the content of luteinizing hormone (LH), which is determined in the urine. Ovulation is caused by an increase in the amount of the hormone, a similar test will indicate the onset of ovulation, but it is not able to determine the days that precede it.

  1. Open the test, read the instructions,
  2. Collect urine for the test (you can urinate directly on the strip),
  3. The test will show the presence (absence) of LH in the urine. If the content of LH is high, then a mature egg will soon be released.

Refer to the gynecologist. Using ultrasound and hormone tests, he is able to determine the onset of ovulation. The accuracy of this calculation is 1-2 days.

Monitor changes in secreted cervical mucus

Its quantity, transparency, and density changes during the menstrual cycle. This method is called the Billings method. To obtain the necessary information you need:

  1. Monitor daily cervical mucus. Some days are characterized by the absence of any discharge (dry). They occur after ovulation, sometimes several days before the start of menstruation.
  2. Check the density of secreted mucus. Usually it is sticky, and in a favorable period it is stingy, like egg white. When the mucus is slippery, stretching and transparent, the ability to get pregnant is higher.

You can keep a table with data on cervical mucus, simultaneously measure the basal temperature.

Not all women are able to establish the beginning of ovulation on individual grounds, such as: feeling of nausea, swelling and slight pain of the mammary glands, painful sensation in the lower abdomen, the presence of ovulatory mucus. Each woman can create an individual calendar for conception independently. She should calculate the onset of ovulation for the period of 3 menstrual cycles.

The most favorable days for conceiving a child is the middle of each menstrual cycle. The very menstrual cycle begins immediately with the 1st critical day, and ends with the beginning of the next menstrual period. With a 28-day cycle, 14-15 days is considered a very favorable period. The countdown is from the first critical day. Due to the short lifespan of germ cells, conception can take place within 3-4 days.

Recommended Poses

Doctors recommended abstinence from sex 3-5 days before expected ovulation. This will allow sperm to mature. For the successful conception of a child by a woman, the ideal position is on the back. Some time after the end of intercourse, it is desirable to fit something under the buttocks (pillow), and the legs must be lifted. For the rapid penetration of sperm directly into the cervical canal using the knee-elbow position. The presence or absence of orgasm has no effect on the success of conception.

The conception of a child is affected by:

  • Stress
  • Lactation,
  • Genital infections,
  • Use of hormonal contraceptives or other drugs.

For the most accurate determination of favorable days for conception, it is desirable to immediately apply a couple of the above methods. When using such methods as: measurement of basal temperature, tracking changes in the cervix, the state of consistency of cervical mucus, contributes to the most accurate determination of fertile days, as well as ovulation itself.

Calendar program (Ogino-Knaus method)

It allows you to calculate with high probability favorable for pregnancy. The basis of this program is calendar method of contraception.

Its essence: with a standard 28-day menstrual cycle, favorable days are from the 12th to the 16th day of the cycle. This program is valid only with a regular cycle without failures.

Method for measuring basal body temperature

The easiest and cheapest way to determine ovulation - basal temperature chart. This is a temperature measurement in the rectum. The definition of "basal temperature" indicates the body temperature in an inactive state.

To measure the basal temperature you need to purchase quartz thermometer. Mercury is not suitable, as it can easily break, which is dangerous for your health.

You can find out whether the conception took place as follows: if the temperature holds after a sharp jump over the next 16 days.

Should remember that hormonal drugs affect basal body temperature. For example, estradiol lowers the basal temperature, progesterone and estro-progesterone increase it.

In the first half of the menstrual cycle, the basal temperature is approximately 36.5-36.6 degrees. Immediately before the onset of ovulation, it decreases to 36.0-36.2.

Next, when a temperature jump occurs, basal temperature is 37.0 degrees. Sexual intercourse without contraceptives in the days preceding and following the temperature difference for a healthy woman guarantees 100% pregnancy.

Cervical mucus method

Cervical mucus during the menstrual cycle changes its appearance and structure. This happens against the background of hormonal changes in a woman’s body.

Immediately after the end of the bleeding, the cervical stopper consists of thick and sticky mucus. Dryness appears in the vagina. During this period, mucus is virtually absent.

Further, when estrogen levels increase in the body, mucus clots are present in the vagina. When the level of estrogen in the blood is at its maximum, ovulation to be.

During her mucus is clear and slippery. According to its consistency, it resembles raw egg white. A feeling of dryness disappears in the vagina.

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