Daysy does not equate contraception! We help you to determine exactly WHEN you have to use contraception.

Family planning contraception: When can't I get pregnant? Your cycle knows the answer.

Use your knowledge about your own cycle to prevent a pregnancy!

The most important prerequisite for a successful pregnancy is that there is an egg that can be fertilised. This egg has to meet a sperm in your fallopian tubes that manages to crack through the outer layer and fertilise your egg. Then the fertilised egg has to take the difficult journey to the uterus and get nested into the uterine lining. Only once this is done are you pregnant.

Okay, but when can one not get pregnant? The moment one of those steps is not followed through, you will not get pregnant. This means that if the egg does not get nested in, if no sperm is around, or not even an egg that can be fertilised, you will not get pregnant. The timing between egg and sperm is decisive for successful family planning. Naturally, you can also use this scientific fact in order to know when to use contraception.

family planning contraception family planning contraception

Family planning contraception with the right timing

Every woman can only get pregnant during a few days of her cycle. The egg itself can only be fertilised during 12 to 18 hours. After that, it dies off and gets ejected with your next period. That means that you can only get pregnant if a sperm reaches the fallopian tubes in these 12 to 18 hours, or if it is already waiting there. Sperm can survive up to five days and wait for the egg inside the fallopian tubes. This makes an interval of about six days during which you can get pregnant. On all other days, you cannot get pregnant.

If you know when you are fertile, you can use this knowledge to prevent a pregnancy by using contraception. It is, however, not a good idea to rely exclusively on your calendar for that: Your cycle can fluctuate at any time and your fertile days can shift up to an entire week! There are far better methods to calculate your fertile and infertile days. One of them requires you to take, record and evaluate your basal temperature in the mornings. With the help of these data, you then draw a temperature curve and „read“ your fertile days off it. This method is usually combined a regular analysis of the cervical mucus that builds on your cervix. When both methods are combined, they offer a relatively high level of precision in calculating your fertile days. They do, however, require a lot of discipline and practice. It is easier, faster and 99,4% accurate to use Daysy, your modern fertility tracker for natural family planning.  

When can you not get pregnant - calculating infertile days

Daysy shows you every morning after a quick measurement whether you will be fertile or not during the next 24 hours. It takes only 60 seconds to measure and the result is displayed immediately.  A red light means „fertile“ and a green light stands for „infertile“. Daysy's software works with a unique algorithm that makes it possible to determine your fertile days as simply and accurately as Daysy does. More than 30 years of research and development have gone into the creation of this algorithm, as well as the evaluation of more than 5 million female cycles.

With Daysy, you can answer the question „When will I not get pregnant?“ for yourself and your cycle anew every day and use this knowledge for family planning and successful birth control.