Online conception calendar Eva. How to determine the date of conception of a child. How to calculate the exact date of birth based on menstruation and find out what week of pregnancy you are at
Calculating ovulation online is a simple, understandable and accessible method to help couples dreaming of a baby.
The ovulation calculator service shows the most suitable days for pregnancy. But there is a small nuance. This method will work for women who have a normal menstrual cycle and who record the start and duration of the cycle each month. It is these data (onset of menstruation, cycle length and duration of menstruation) that must be entered into the calculator to calculate the most suitable time for conception.
To get the most accurate results, we must not forget about the characteristics of the body, as well as various factors influencing the maturation of the follicle.
When pregnancy occurs
Not every sexual intercourse without the use of contraceptives should result in pregnancy. It is the desired phase of the menstrual cycle that determines conception.
Physiological processes in the female body depend on the phase of the cycle. The hypothalamic-pituitary system is responsible for the functioning of the reproductive organs. Releasing hormones produced by the nuclei of the hypothalamus are responsible for the functioning of the pituitary gland. Gonadotropic hormones, secreted under the influence of releasing factors, control cyclic changes in the reproductive organs, including ovulation.
Ovulation occurs approximately in the middle of the cycle; the egg, after the rupture of a mature ovarian follicle, moves into the fallopian tube. Within 24 hours, the egg can be fertilized. To avoid missing this moment, you can use an ovulation calendar.
There are three phases of the cycle:
- Follicular phase. It begins on the first day of menstruation and lasts on average 14 days. It is characterized by an increase in the follicle-stimulating hormone FGS in the blood. It is he who regulates the maturation of follicles. Subsequently, one dominant follicle remains, which prepares to move into the next phase.
- Ovulatory phase. During this period, the follicle ruptures and the egg is released. That is, ovulation occurs. You can calculate this phase using an ovulation calendar.
- Luteal phase. Duration – from 13 to 14 days. It is characterized by the appearance of the corpus luteum, which secretes estrogens. During this period, the uterus is ready for implantation of a fertilized egg.
If conception does not occur, the corpus luteum ceases to perform its functions, as a result of which the endometrium exfoliates and menstruation begins. From this day onwards they consider the beginning of a new cycle.
Reliability and benefits of ovulation calculation
What are the advantages of the calendar:
- easy to use;
- safe and fairly accurate method for a regular menstrual cycle;
- quick result.
Important: Whether pregnancy occurs or not directly depends on the motility and viability of sperm. If sexual intercourse occurs too often, the relative number of sperm in the semen decreases. Therefore, a couple who is “striving” with all their might to conceive should wait for a favorable time for conception, and thereby increase their chances.
An ovulation calendar also helps prevent unwanted pregnancy.
This method should not be used by women who have problems with hormonal levels and cycle regularity. In this case, the results will not be reliable.
Other pregnancy planning methods
A woman can become pregnant after just one sexual encounter, but it is important for most couples to plan and prepare for pregnancy in advance. In addition to the online calculator, there are other methods that allow you to determine a woman’s ovulatory period:
Body temperature measurement
Immediately after sleep and before the start of physical activity, the temperature is measured. Its indicators allow you to assess hormonal homeostasis. The onset of the ovulatory period is characterized by an increase in temperature by 0.25-0.5 degrees. This method requires constant monitoring, attention, and regular recording of temperature readings.
Functional tests
These include:
- "Pupil" symptom. To determine the phase of the menstrual cycle at this stage, the degree of expansion of the external os of the cervical canal is assessed. Maximum dilation indicates a favorable time for conception, and means that the concentration of estrogen is at its peak.
- Assessment of cervical mucus viscosity. The nature of mucus changes under the influence of estrogens. During the ovulatory period, the maximum concentration of estrogen leads to the highest viscosity of the mucus, which is visible when stretched (about 12 mm).
- Ovulation test. Depends on the phase of the cycle and shows the level of luteinizing hormone (LH). LH peaks before ovulation.
- Karyopyknotic index (KPI). A smear microscopy is done, and the ratio of pyknotic (keratinizing) cells to intermediate cells is revealed. The ovulatory period of CPI fluctuation is 60-80%.
- Fern symptom. Cervical mucus is examined on a glass slide under a microscope. Upon contact with air, a pattern in the form of a fern branch becomes visible. The most pronounced and clear pattern is observed precisely during the ovulatory period, when the amount of estrogen is maximum. If there is no characteristic pattern, estrogen deficiency is noted in the body.
- Ultrasound examination (ultrasound). Allows you to evaluate the functioning of the ovaries and the size of the endometrium.
You can also determine whether ovulation has occurred or not by the following signs:
- dull pain in the lower abdomen, sometimes localized on one side;
- more liquid mucus from the cervical canal, for better penetration of sperm into the uterine cavity;
- increased sexual desire - the so-called reproductive instinct;
- soft cervix, painful mammary glands;
- changeable taste, improved sense of smell;
- a surge of energy and strength;
- slight weight gain due to difficulty removing fluid.
The simplest, most convenient and free method of determination is a specially designed calculator. A woman does not have to regularly visit a doctor or look for an ovulation test; she just needs to enter the data online.
If we talk about the greatest reliability of the results, it is still better to undergo an ultrasound. During the study, the doctor will see the presence of a mature follicle and determine the beginning of the ovulatory period. Ultrasound is the best research method when planning a natural pregnancy, IVF, and when monitoring an existing one. It is recommended to carry it out several times over a certain period of time. If a woman does not have any pathologies, then an ovulation test can also determine the body’s readiness to conceive.
How to find out if conception has occurred
Immediately after fertilization of the egg, hormonal changes begin in the female body. Pregnancy can be suspected if the following signs are present:
- pain in the lower abdomen, sometimes in the side;
- breast enlargement and nipple areola;
- painful sensations when touching the chest;
- slight bleeding;
- flatulence, toxicosis;
- slight increase in basal temperature.
Over time, all these symptoms become less pronounced or disappear.
The above signs cannot be called absolutely reliable. Often these same symptoms accompany problems with the abdominal and pelvic organs. They can also occur against the background of stress and anxiety associated with the absence of a long-awaited pregnancy.
Therefore, to find out whether pregnancy has actually occurred or not, it is better for a woman to wait until the expected date of menstruation, and, if there is a delay, conduct a regular pregnancy test at home. This test is virtually error-free.
If the result shows pregnancy, an ultrasound can be done after two weeks. During this period, the doctor will be able to detect the presence and number of embryos, determine the position of the fertilized egg in the uterus, and viability.
Online calendar and contraception
This service will be useful to couples not only when planning a child, but also to prevent unwanted pregnancy. If pregnancy is not part of your plans, then you should use protection for three days before the ovulatory period, and the same number of days after. This method is not 100% reliable, as there may also be hormonal abnormalities and cycle disruptions. It is more reliable to combine this method with other means of protection (condoms, hormonal contraceptives, intrauterine device).
If you feel well, are planning a pregnancy, but it still doesn’t happen, don’t despair. The specialists of the AltraVita clinic have been successfully dealing with problems with pregnancy for many years.
There is all the necessary equipment for a comprehensive examination, and you can go for an examination and identify the cause of the absence or failure of pregnancy. For each specific couple, a diagnostic scheme is developed, and depending on the result, recommendations are issued.
Our fertility doctors have extensive practical experience in treating infertility associated with various causes. You can find telephone numbers for making an appointment with a specialist on the clinic’s website.
Any symptoms can be decisive, so every little detail is important in diagnosis. During diagnosis, the doctor will be able to determine fertility (the body’s ability to reproduce healthy offspring), and then prescribe appropriate therapy, the purpose of which will be to establish a normal cycle and reproductive function. The sooner the problem is identified, the sooner it will be resolved using gentle conservative methods. And if necessary, you can use assisted reproductive technologies.
When to conceive a child? How to calculate ovulation days for conception? Now this is not a problem. Using our online ovulation calculator, you can calculate the conception calendar, where every woman gets the opportunity to control her menstrual cycle and the ability, using the calendar, to calculate the most favorable days for conceiving a child and becoming pregnant.
Ovulation calendar: how to calculate for conception.
By filling out the fields of the calendar calculator form, you will automatically receive online results of the most favorable ovulation days for conceiving a child, highlighting them in different colors for ease of perception.The principle of operation of the ovulation calculator for calculating the conception calendar
In the middle of the menstrual cycle, every woman experiences ovulation day, this is the period when the egg matures for fertilization. In the calendar results, you will be able to see them highlighted in red and orange.- Red color- This is the most likely day for conception.
- Light orange - 90% chance of conception
- Light red – these are days in which the possibility of conception is from 80%.
- All safe days are selected in white, which usually fall at the end of the cycle and the days of menstruation.
- Start date of the menstrual cycle.
- Cycle duration.
- The number of cycles
Different married couples have different attitudes towards the possibility of planning a pregnancy and even the sex of the unborn baby. Some people prefer to trust chance, while others want to somehow influence nature or try to increase their chances by acting according to its rules.
Cyclic processes constantly occur in the female body due to the activity of the hormonal and reproductive systems. They find their manifestation in the menstrual cycle, which normally repeats every month. The period of egg maturation, ovulation and menstrual bleeding replace each other, and all these processes are aimed at a common goal: fertilization of the egg maturing in each cycle, the potential conception of a child and the onset of pregnancy. But, unfortunately, in some cases, a woman and a man who decide to become parents fail to find the most suitable moment for this.
Calculating the conception calendar will be especially useful for those women who want to get pregnant as quickly as possible: using the calendar, you can select the most favorable days on which to schedule sexual intercourse, so that pregnancy is highly likely to occur.
To do this, you just need to enter some data into the interactive windows of our calculator: the date of the first day of your last menstrual period, the average length of your menstrual cycle and the period you are interested in getting pregnant.
Using this service, it is possible to calculate the most favorable days for your body specifically for conception in this or the next menstrual cycle, as well as create a schedule of the best days for a longer period of time - from several months to a year. This function will significantly increase the likelihood of pregnancy if you apply the data obtained in practice, as well as use some tips to get pregnant faster: refuse sexual intercourse on the eve of the fateful act, restore physical strength with prolonged sleep and emotional peace, direct your efforts to improve
blood circulation in the pelvic organs, reconsider your eating habits and, possibly, lifestyle, and so on. Moreover, you must understand that these recommendations apply equally to both potential parents - both women and men.
It is believed that if you calculate the conception calendar, you can to some extent plan the gender of the unborn child. There are various methods for planning the gender of the unborn child: by blood type, by blood renewal, by horoscope, by date of conception, etc. But our service provides the opportunity to calculate the conception calendar using a table compiled using empirically derived patterns based on average statistical data.
The vast majority of women know about such a thing as ovulation. But not everyone knows how to calculate the timing of its onset. There are several ways to help you find out the cherished date in each new menstrual cycle. However, the easiest way to do this is to use an ovulation calculator: it is better to calculate the most suitable days for conception with its help.
To get the result, you must enter the date of the first day of your last menstruation, the duration of the menstrual cycle and bleeding. You also need to indicate how long the calculation is required. As soon as the data is provided, you will be able to see a graph indicating the expected dates of menstruation and days favorable for conception.
Decoding the result:
Days of menstruation
- Ovulation
Favorable days for conception
Hello dear blog readers. If one of you is not fully aware, why do it at all? I'll explain. The fact is that for fertilization this process plays an almost dominant role. You need to know the date of egg maturation in order to effectively protect yourself from an unwanted pregnancy, or to obtain this pregnancy. However, often “mere results” are not enough. That is why we will analyze in detail why and when the egg leaves the ovary, and how to accurately calculate ovulation using different methods.
Physiological aspects
Ovulation is the process of the release of a mature egg from the ovary. This happens under the influence of neuroendocrine mechanisms at different levels. This term means that nerve impulses and hormones play a role in this. Without going into details, let's look at what happens in the body.
The menstrual cycle is counted from the first day of the previous one until the beginning of the next menstruation. As soon as the bleeding ends, the next follicle begins to mature in the ovary, containing a germ cell - the follicular phase of the ovarian cycle begins. Gradually, with the development of the egg, the level of sex hormones increases.
By the time the follicular formation finally matures, the female body has a peak level of estradiol (the most active subtype of estrogen). When this value is reached, the walls of the follicle begin to collapse - the ovulatory process begins, triggering the luteal phase. As soon as the reproductive cell is “free,” it is sent to the fallopian tube, where it is able to live for 24 hours, waiting for its sperm.
In place of the torn “receptacle” of the germ cell, the corpus luteum matures - this is, relatively speaking, the “yolk” that will nourish the fetus until the placenta is formed. If conception does not take place, then the egg dies, and the corpus luteum regresses as unnecessary. Throughout the entire period of its “life,” it produced the hormone progesterone, which is designed to help the fertilized egg implant (introduce) into the wall of the uterus. It softens the endometrium (the inner lining of the uterus), makes it loose, and improves blood supply. But with the regression of the corpus luteum, this hormone becomes less and less. And the loosened epithelium can no longer become “tight” again. Therefore, as soon as the level of progesterone decreases critically and the level of estrogen increases, another menstrual bleeding begins - rejection of the uterine epithelium.
So, ovulation is the release of an egg from its “shelter”. This “action” occurs approximately in the middle of the cycle (for example, if the latter lasts 28 days, on the 14th day). The release of the germ cell from the follicle can take place on the 13th and 15th day, this is considered normal. But the fact is that that same corpus luteum always lives only 14 days (rarely ±48 hours), regardless of the duration of the cycle. This means that if it lasts 35 days, then ovulation will take place on the 21st day, and if it is 22, then on the 8th. An ovulation calculator can calculate the optimal date for conception based on these data.
But what to do if you have an irregular cycle? When one time there are five weeks between bleedings, and the other time it is three weeks? In addition, there are such concepts as early and late menstruation, which are deviations from the norm, but occur frequently. How do you know when the time is right to start getting pregnant?
Calculation of ovulatory date
There are many methods to help find out exactly when the reproductive cell will mature and be released. Among them:
- online ovulation calculator (calculating the appropriate date for conception is the easiest and fastest), essentially repeats the calendar method;
- temperature method;
- cervical method;
- symptothermal method;
- by ultrasound.
Test Methods:
- test strips;
- inkjet tests;
- using a microscope;
- "fern" method.
It should be noted that to achieve reliability of any of the listed methods, it is necessary to carry out measurements for at least 5-6 cycles. You can compare what data the calculator provides and how the body actually behaves.
Calendar method
In principle, it has already been described in the previous section. It can only be used by those women who can boast of having periods “just on schedule.”
Observation must be carried out for 6 “circles”. You need to keep a menstrual calendar, clearly marking the start and end dates of bleeding. For analysis you need:
- Identify the longest cycle. You need to subtract 12 from its length in a day. Why this particular number? As already mentioned, the corpus luteum lives only 14 days. For the reliability of calculations and taking into account possible physiological variations, it is worth slightly “expanding” the possible period of its appearance. This will be the last day in this cycle when conception can take place.
- Find the shortest cycle. Subtract 19-20 from the number. The calculation is as follows: for example, the cycle duration is 26. Of these, 14-15 are the luteal phase. This means that ovulation occurred on day 11. However, sperm can live in the vagina for 2-3 days. Thus, starting from 8-9 days and ending with 12 are days favorable for conception.
Basal temperature measurement
Basal temperature is the “warming” of internal organs in a calm state.
It is necessary to measure the temperature:
- in the rectum (acceptable - in the vagina and mouth);
- at least 5-7 minutes;
- daily (including during menstrual bleeding);
- at the same time;
- immediately after sleep, which lasted at least 3-5 hours;
- with the same thermometer.
In the follicular phase of the menstrual cycle, the temperature does not exceed 36.4-36.8°C. However, 12-24 hours before the separation of the egg from the follicle, it rises, sometimes by almost a degree! This occurs to stimulate the rupture of the follicular formation. And throughout the postovulatory period until the first day of the next bleeding it remains at a level of 37.1-37.5°C. The period of time from the beginning of the cycle until the third day after the temperature jump is considered fertile.
This technique is used mostly for contraception rather than for pregnancy planning. After all, ovulation is often “visible” after the fact, when it has occurred. And after the third day of rising temperature, pregnancy is not possible until the next cycle.
However, it is best to combine the method of measuring basal temperature and an ovulation calculator - you can calculate the days for conception more accurately.
Cervical method
The vagina and cervix are very “slimy” organs. The possibility of pregnancy, local immunity, and the condition of the mucous membrane depend on the presence of this natural secretion. The condition of cervical mucus greatly depends on the level of hormones in the body. The more estrogen, the more liquid the secretion. Immediately after menstruation, it is almost gone, which is unfavorable for sperm. Then it appears, but thick, viscous, like glue. It is inconvenient for male reproductive cells to move through it; they feel like they are in a swamp. Gradually it becomes more liquid, and by the time of ovulation it is watery, slippery, reminiscent of egg white. Here they swim straight to the uterus.
Symptothermal method
The most reliable of the above is... a combination of these methods. If you calculate the release date of the egg according to the calendar, monitor the temperature and the state of mucus for several months, you can learn to determine ovulation almost accurately. Thus, in order to achieve conception, you need to carefully monitor your body.
Ultrasound diagnostics
Ultrasound is one of the key research methods in gynecology. With its help, you can track the process of follicle maturation from the very beginning until the release of the egg. This is done by a functional diagnostics doctor who records the size of all follicular formations in the ovaries. As the moment of release of the egg approaches, one of them should increase in size, so that it will soon rupture and turn into the corpus luteum.
If the doctor sees that none of the follicles are growing, then he is forced to state an anovulatory, “single” cycle. It is possible to diagnose:
- hormonal deficiency (the formation has already developed, but the cell does not come out of it);
- premature hormonal effects (corpus luteum begins to form even before ovulation);
- cyst formation (postovulatory follicle growth);
- and etc.
It is worth noting that the calculator is not able to provide for anovulatory cycles and failures. Therefore, if there are any abnormalities or suspicions of them, it is necessary to be examined using ultrasound.
Test Methods
Similar to tests for determining the level of hCG (pregnancy test), there are test strips for recording luteinizing hormone, which is responsible for ovulation. There are inkjet tests, as well as strips that need to be dipped into urine. They can show one stripe (ovulation is “far away”), “one and a half”, in the sense of one fuzzy (usually 2 days before and 2 days after the release of the reproductive cell) and two - “we are here”.
To use such strips, it is necessary to use the calendar method. You must first calculate the average cycle length, find the approximate date of the ovulatory process, count 3 days from it and start conducting tests.
As already mentioned, at the ovulatory moment the body contains the largest amount of estrogen during the entire cycle. To find out what the content of this hormone is, they use the “fern method”. It is necessary to apply saliva to the glass. On days when the hormone content is low, when drying, salt from the liquid is deposited in the form of randomly located points. But when estrogen levels are high (2-3 days before ovulation and 2-3 after), these points are systematized and resemble a fern leaf.
Photo enlarges when clicked Today glass has been replaced by mini microscopes the size of a lipstick tube. It has an area for applying biological fluid, as well as an eyepiece in which the result is visible. The principle of operation is similar to the “fern” one. Interpretation is carried out using control drawings from the instructions.
Thus, you can use anything: ultrasound, test strips, ovulation calculator - calculating suitable days for conception is not a problem. It is useless to argue about which of the listed methods is more accurate: ultrasonic, of course. However, it is less accessible and requires regular and frequent hospital visits. The test method is only slightly inferior to it. However, it is best to use a combination of several techniques. What to do if the cycle “jumps”?
Irregular cycle
How to calculate ovulation with an irregular cycle? The optimal test method is a mini microscope. The costs will be minimal (one such device costs about 300-400 rubles), the “equipment” will last a long time, and it will accurately show ovulation. And if you conduct research every day, then it is impossible to miss it.
You can also use the cervical method. Cervical mucus is one of the clear indicators of approaching ovulation, and it begins to change a few days before it.
But the temperature and calendar methods will be of little help, including a calculator, because even if you monitor your menstruation for a year, the calendar calculation of the date of ovulation will be purely approximate.
Conclusion
Thus, with a regular cycle, the ovulation calculator can calculate the best time for conception “at once”! To be sure that the calculation is correct, you can repeat it yourself, as well as use other methods. However, if you experience any problems with your cycle or suspect recurring anovulatory periods, be sure to consult your doctor. I hope that this article was useful to you, and I bid you farewell until the next useful materials. To make sure you don't miss the weekly newsletter, subscribe in the right panel of the blog.
Menstrual cycle
There is a common misconception that a woman's menstrual cycle should last exactly 28 days, and ovulation should occur exactly “on the 14th day of the cycle” or “in the middle of the menstrual cycle.” This is not true.
In reality, the menstrual cycle is divided into two phases - follicular (before ovulation) and luteal (after ovulation).
Follicular phase
The follicular phase (preceding ovulation) begins on the first day of the last menstruation and lasts until one dominant follicle (or several) matures in the ovaries. It ends with ovulation.
Luteal phase
The luteal phase (corpus luteum phase) begins from the moment of ovulation and lasts about 12-16 days.
In place of the ovulated follicle, a corpus luteum forms within a few days after ovulation. Its main function is the synthesis of progesterone and estrogens to maintain future pregnancy. If pregnancy does not occur, then after 10-12 days the corpus luteum undergoes reverse development, which leads to a drop in hormone levels, after which the next menstruation begins. If pregnancy has occurred, the corpus luteum continues to function and support the pregnancy.
In the absence of pregnancy, progesterone levels reach their maximum value about a week after ovulation - at this time it is recommended to take a blood test for progesterone to assess the function of the corpus luteum.
Duration of the menstrual cycle
The follicular phase can vary in duration (both among different women, and within one woman throughout her life). Typically, 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 the maturation of the follicle occurs faster or slower than usual, or does not occur at all. The luteal phase usually has a constant duration (12 to 16 days).
Gender of the child
The sex of the unborn 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 - those carrying a male Y chromosome or a female X chromosome. Spermatozoa of the “male” sex, as a rule, move more easily and more quickly than “female” ones, but are more sensitive to external conditions and adverse influences. Female sperm, on the contrary, are less mobile, but more resilient. Thus, if sexual intercourse occurs on the day of ovulation or later, the likelihood of having a boy increases, and if sexual intercourse occurs long before ovulation, then the likelihood of having a girl increases and the likelihood of conception decreases. However, experts believe that the reliability of this method does not exceed 60%.