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How can I calculate my ovulation?


Hoe kan ik mijn ovulatie berekenen?


How can I calculate my ovulation?To know when you are ovulating and therefore when your fertile period starts, you will have to get to know your body in a way that feels good. 

In each cycle, there are only a few days when a woman is fertile. Therefore, if you are trying to become pregnant, it is recommended that you have sex on these days. If you do not want to become pregnant, be extra careful during these days. 

 Ovulation usually occurs halfway through the menstrual cycle: an egg is released and travels from the ovary through the fallopian tubes to the uterus.

The cycle length varies from woman to woman and from cycle to cycle. Therefore, it is important to know how many days your cycle lasts in order to calculate your ovulation. 

How do you know when your egg is about to jump? 

1. Vaginal discharge (cervical mucus) 

    The oestrogen level reaches its peak just before ovulation. Oestrogen helps prepare your body for ovulation by thickening the uterine wall and also causes a sperm-friendly endometrium to form. This mucus is clear, thinner and stretchy. You have more vaginal discharge and it all feels a bit wetter. This is also a sign that you are in your fertile period.

    2. Body temperature 

      Your body temperature rises the moment you ovulate. On average, your temperature after ovulation is approximately 0.2 to 0.4 degrees higher than before ovulation. It is advisable to take your temperature every day in the morning and keep a record of it in a chart. If you do this often enough, over time you can begin to see a certain regularity in the temperature changes, so you will have an idea of when ovulation usually occurs. This method is reliable if you use it in conjunction with analysing your cervical mucus. In the beginning, it takes a lot of discipline to keep track of and analyse everything. Therefore, let yourself be guided by a Fertility Awareness Advisor. 

      3. Ovulation tests

      To determine with more certainty when you are fertile, you can also use ovulation tests. 

      They are very easy and clear to use. 

      The Guud ovulation test detects and measures an important fertility hormone: luteinising hormone (LH). When the LH peak is at its highest, ovulation takes place within 24 to 48 hours. 

      The oestrogen level in your body rises in the days before the luteinising hormone (LH) peak. Your most fertile days coincide with the LH peak. This peak lasts 1 or 2 days. 

      To find this peak, you will need to test on a number of consecutive days. The best time to test depends on the length of your cycle, as this is different for everyone. 

      Watch out! The egg cell lives for 12 to 24 hours.

      After ovulation, the egg cell enters the fallopian tube and can be fertilised. The mature egg cell lives for approximately 12 to 24 hours. While sperm cells can survive for 2 to 3 days in the uterus and fallopian tubes.

      To increase your chances of pregnancy, it is best to have sex one or two days before and on the day of ovulation.

      Do you have any questions about this, feel free to ask them via the live chat at the bottom right of the page.


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