The ovulation calculator
Ovulation occurs around the middle of the cycle, although the exact time varies from woman to woman. With the help of an ovulation calculator, the fertile days, when the chances of pregnancy are particularly good, can be calculated for a reasonably regular cycle. How does such a fertility calculator work and how reliable are the results?
Cycle calculator: How to increase your chances of pregnancy
If you want to have a baby, you often can’t wait for the pregnancy you’ve been longing for. But unprotected sexual intercourse alone is often not enough. For fertilization to actually occur, the sperm must meet the fertile egg. An ovulation calculator helps you to calculate the fertile days and thus determine the best time for sexual intercourse.
Understanding the cycle: When are the fertile days?
A woman’s cycle is subject to natural fluctuations. On average, we assume a 28-day cycle, but it can be shorter or longer. In this average cycle, ovulation occurs on the 14th day. It is important for pregnancy that the second half of the cycle lasts long enough for a good uterine lining to build up in which the fertilized egg can implant.
The female cycle is divided into three phases:
- the proliferation phase (before ovulation)
- the ovulation phase (around ovulation)
- the luteal phase (after ovulation)
The ovulation calendar can identify the days in a woman’s cycle when the chances of pregnancy are particularly high. Fertile days are the period around ovulation when an egg is capable of fertilization. The window for this is 12 to 18 hours after ovulation. However, sexual intercourse does not only lead to pregnancy in this small window of time. Sperm can survive between three to five days in a woman’s body, “waiting” for the egg. As a result, women can be fertile even in the days before ovulation. The ovulation calculator helps to determine exactly this time.
Did you already know? For most women, the cycle is between 21 and 35 days. If there are significant deviations from this cycle length, a doctor should be consulted, for example, to rule out PCO syndrome or luteal insufficiency.
How does an ovulation calculator work?
The ovulation calculator is programmed to determine the time when unprotected sexual intercourse or sperm transfer into the female body can lead to pregnancy. The following information is needed for this purpose:
- the first day of the last period
- the average length of the cycle
Based on these data, the ovulation calendar shows the expected day of ovulation and the beginning and end of fertile days.
How reliable are the results of the ovulation calendar?
If you have a very regular cycle, the ovulation calculator provides quite reliable results. However, these are only indications and not reliable predictions. For example, you cannot tell from the ovulation calculator whether ovulation is taking place at all, which is the most important prerequisite for pregnancy. In addition, the ovulation calculator does not take into account the natural fluctuations of a monthly cycle, which can be caused by stress or illness for example.
How does a fertility calculator work for an irregular cycle?
If you have a very irregular cycle, it will be difficult to determine ovulation just by using an ovulation calendar. To know approximately when your fertile days are, you can, calculate the sum of all cycle days from six cycles and divide the result by six (the number of cycles). This will give you your average cycle length. However, if you have an irregular cycle, you should always use other indicators in addition to the ovulation calendar.
Further indications for the fertile days
To increase the reliability of your results, you can use other indicators to determine your fertile days and get pregnant faster. The cervical mucus provides information about the current cycle. If it draws threads like raw egg white, then the fertility window is most likely opened. Palpating the cervix and measuring the temperature also helps to detect ovulation.
When is a pregnancy test worthwhile?
About seven days after fertilization, implantation occurs and the fertilized egg begins producing the pregnancy hormone HCG. From the eighth day after implantation, the hormone can be detected in the urine. Pregnancy tests now already show the correct result with a probability of over 90%.
THE OVULATION CALCULATOR IS NOT SUITABLE AS A CONTRACEPTIVE METHOD.
Some couples use the ovulation calculator as part of natural contraception. The ovulation calendar can be used to determine the fertile days when additional contraceptives such as condoms would need to be used to prevent pregnancy.
However, the ovulation calendar is only conditionally suitable for contraception and in no case as the sole mean of contraception, as it does not provide 100% reliable results. If the cycle shifts for example, pregnancy can still occur.
Which is the best ovulation calendar?
Online you can find many cycle calculators, which are all based on the same method. For example, the ovulation calculator from Babelli shows you when the chances of pregnancy are good. In the end, you can see for yourself which calendar you like best.
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