Daysy is an intelligent fertility tracker that lets you get to know your very own menstrual cycle. Daysy is to be used to facilitate conception and track your cycle. Daysy is not a replacement for contraception.

Reliable and precise from day one thanks to the Daysy fertility calculator

Calculating when you are in your fertile or infertile phase is no easy task. To be precise, you need reliable data. Daysy makes it simple to know when you are fertile by taking your waking temperature, tracking this data, and calculating when you are in your fertile and infertile phases. Daysy indicates your fertile window with reliability and precision. A pregnancy can be specifically planned with this knowledge.

These factors play a role in calculating your fertile days:

  • Menstrual Cycle length: A cycle starts on the first day of menstruation (= 1st day of cycle) and ends on the day before the next menstruation. Each cycle is different and can even vary.

  • Your basal body temperature (waking temperature) is slightly lower in the first cycle phase and increases by 0.25-0.45°C around the time of ovulation.

  • Record all measurements and remember other factors that could have an influence, such as an infection or fever.

  • Understanding all of the above information and calculating your fertility status every day.

  • Besides all the complicated things mentioned, do not forget to find the best time to be intimate with your partner.

Sounds like a lot of work? Well, it is! That is why we developed Daysy fertility monitor- so that you can calculate your infertile and fertile phases more easily.

You do not have to do a lot of work: Just use Daysy fertility calculator in the morning to measure your basal body temperature under your tongue and enter if you have your period. Daysy automatically calculates everything for you. The compact ovulation tracker is easy to use and fast – but more importantly, Daysy is reliable.

If you use Daysy fertility monitor regularly, Daysy will not miss anything – on the contrary: Daysy records your menstrual cycle history so that you are always in the know of what is happening in your body. Daysy offers a very reliable and precise ovulation calculation.

With Daysy you measure your basal body temperature (or: BBT) in the morning with an advanced temperature sensor. Daysy fertility monitor then analyses your measurement with the algorithm, which incorporates data from 5 million menstrual cycles and 30 years of research, and can tell you with certainty whether you are in your fertile phase or not.


The tried and tested Daysy program: With Daysy fertility calculator you can relax

The Daysy fertility calculator recognises, analyses and displays your menstrual cycle individually and reliably. The technology-based temperature method, used by Daysy, is one of the most reliable methods in the world for fertility tracking.


The Woman’s Cycle: Medical basics

There are some basic physiological facts with regard to the cycle:

  • Every woman has only one ovulation per cycle.

  • If two or more instances of ovulation occur, they take place within 24 hours.

  • After ovulation, the ovum is fertile for a maximum of 18 hours.

  • Sperm is able to move and fertilise in a woman’s body for a maximum of 5 days.

  • Besides all the complicated things mentioned, do not forget to find the best time to be intimate with your partner.

This means that pregnancy can occur on on 6 days, i.e. 5 days before ovulation and on the day of ovulation itself. Daysy calculates these 6 days and then indicates them to you.


Variations in the menstrual cycle: No cause for concern

Every woman has her own unique cycle, and it is not necessarily the same every month. Daysy fertility monitor learns your unique cycle rhythm and how to assess it. At the same time, it gives you a sharpened awareness of your body.

Your cycle is influenced by your emotional state, too. Stress and other factors can affect your body, which can have an impact on your cycle. By recording your data on a daily basis, Daysy fertility monitor is able to recognise and indicate these changes in your life.