It is worth being prepared for your period. In order to estimate when it is due, you need to consider your average cycle length as well as the date when your last menstruation started and how long it lasted.
Based on the data you have entered, you will receive estimates relating to your further periods and an upcoming fertile window.
is a free mobile application that will help you better control your cycle.
learn moreRemember that the ovulation calculator and observing your body do not guarantee precise calculation of your fertile window. There is a range of factors that may cause ovulation and fertile days to shift, such as:
– strong stress,
– illness in the first cycle phase and antibiotic use,
– heavy physical strain,
– diet and weight loss,
– climate change,
– sleep deprivation,
– general fatigue.