There are also different manual methods to calculate the fertile days of a woman based on her cycle. They are, however, time-consuming and prone to errors. In order to be able to calculate your fertile days, you have to study your cervical fluid regularly, feel your cervix and potentially determine the hormonal value in your urine with test sticks, and all that in addition to measuring your temperature with a suitable thermometer every day. All those methods can offer a high level of accuracy if done correctly, but they will take a lot of time and work.
An easier, quicker and more comfortable way to calculate your fertile days is the fertility computer Daysy. With Daysy you can stop writing down and evaluating your data, and you no longer have to worry about making a mistake. The use of Daysy is particularly simple and quick. This way you have more time left for the nice things in life.