The application of how to calculate the menstrual cycle is a very easy and fast mechanism that allows you to perform the process of calculating the date of the next menstrual cycle and the days of ovulation with extreme accuracy up to 12 next cycles, which equates to about a full year so that the beginning and end of each cycle and the beginning and end of each ovulation period are clarified, so all you need to benefit from our service is Enter the date of the first day of your last menstrual cy