Detect & calculate ovulation

Ovulation is the central element in the female cycle – the interaction of various hormones ensures that the mature egg cell leaves the ovary and makes its way through the fallopian tube. This is the time of ovulation - and fertilization is only possible from the moment when the egg has started its journey. here we have already written down what happens when in the cycle and which hormones trigger what at what time.

However, it is worth taking a closer look at ovulation itself, because the time of ovulation plays a major role in the family planning. If you know exactly when you ovulate, you can calculate when you are fertile and when you are not.

Find out more about ovulation on this page and get to know yourself and your body better.

When does ovulation take place?

In theory (i.e. with a very regular cycle of 28 days), ovulation statistically takes place on the 14th day of the cycle. In reality, however, this calculation applies to well under 20% of women.

When is ovulation delayed?

The time of ovulation can change in each cycle. The hormones react to our living conditions: the egg cell grows in order to be potentially fertilized and then the body takes a close look at the circumstances: Stress, illness, psychological processes, travel, etc. can delay ovulation and cycle lengths change.

  • What is ovulation?

    Ovulation is the moment when the mature egg cell “jumps” out of the ovaries and into the fallopian tube. The mature egg makes its way to the womb (uterus) and can now be fertilized.

    Driven by the hormone FSH, several egg cells grow in the ovaries. A so-called follicle is located around each egg cell. The hormone estrogen is produced in the wall of this follicle.

    There is a competition between the maturing follicles: one of the follicles grows the fastest and reports: I'm ready. Now the hormone LH (luteinizing hormone) comes into play and so-called ovulation occurs: the winning follicle bursts and releases the egg cell into the fallopian tube - where it makes its way towards the uterus.

How to calculate ovulation?

Ovulation cannot be calculated mathematically based on cycle length. This calculation does not take into account the individual circumstances and living conditions. The day of ovulation can vary in each cycle - that's why it's important to check the current fertility status on a daily basis and not just rely on the calendar.

When am I fertile?

The egg lasts much less long than many people think: it can only be fertilized by a sperm about 12 to 24 hours after it has burst out of the follicle. Nature has come up with something clever to extend the period: Sperm can survive in the female body for up to five days - so theoretically it is enough to have vaginal intercourse five days before ovulation to catch the fertilization window of the egg cell.

When exactly are the fertile days?

The fertile days are the days when you can get pregnant. Since the sperm can survive in the female body for up to five days, this period is called fertile: the four days before ovulation, the day of ovulation itself and the three days after ovulation. 

trackle knows all this: All fertile days around ovulation are displayed in the evaluation in your trackle app. With trackle you know exactly when your fertile days are. Buy trackle now and easily know when you are fertile.

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Here you can find out everything about the female cycle, ovulation, cervical mucus and how you can observe and get to know your body. Become a cycle expert with our free e-book and learn when you are fertile and when not.

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Recognizing ovulation: these are the signs

The various hormones that play an important role around ovulation (e.g. estrogen) also influence other areas of our body. For example, the cervical mucus changes or bleeding can occur between periods. Here are some signs that can help you identify ovulation:

  • Zervixschleim

    The hormones estrogen and progesterone cause the Zervixschleim to change. The closer you get to ovulation, the more glassy and stretchy the cervical mucus becomes. When you have it between your fingers, it pulls strings - it's more spinnable. Its appearance is reminiscent of raw egg white.

  • cervix

    The cervix, or cervix, is also affected by the hormones in a woman's menstrual cycle. At the beginning of your cycle, the cervix is rather hard and protrudes into the vagina. As ovulation approaches, the cervix softens, opens up and even rises a little higher. You can examine the cervix yourself by inserting two fingers into the vagina and feeling how the cervix feels.

  • temperature

    The hormone that is released after ovulation - progesterone - causes your core body temperature to rise - by about 0.2°C. However, it is not enough to measure the temperature only once, because the temperature level alone does not tell you how high the progesterone is. In order to determine an increase, you therefore need a temperature profile.

  • middle pain

    Middle pain is a stabbing or pulling sensation in the lower half of the abdomen and is seen by some women around the time of ovulation. Middle pain is not a sign that ovulation is taking place at that moment. Middle pain only occurs in some women near ovulation.

  • intermenstrual bleeding

    You can sometimes recognize ovulation by bleeding between periods. This, or spotting, occurs in some women around the time of ovulation. The intermenstrual bleeding is either a slightly reddish discoloration of the cervical mucus or even partly like real bleeding. The spotting is therefore a sign of high fertility.

  • libido change

    Many women report having more sex around the time of ovulation. The reason for this change in libido is probably the increasing estrogen concentration. That's where the primal instinct comes up in us: It makes sense to have more sex during the fertile time - at least if you look at it from an evolutionary and reproductive side.

What are the differences between ovulation and fertile days?

The egg cell can only be fertilized about 12 to 24 hours after it has burst from the follicle. To extend this period, Mother Nature came up with something pretty clever: sperm can survive in a woman's body for up to five days. If you want to get pregnant, it is theoretically enough to have vaginal intercourse five days before ovulation.

So you are not only fertile on the day of your ovulation, but also on the four days before and the three days after. We know that getting pregnant is often not that easy, but perhaps knowing that there is not just one day in the cycle when you are fertile takes some of the pressure off, but a whole fertile day around ovulation time window exists.

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