(3) Where, in an appeal under this Act, a penalty assessed by the Minister under this section or section 163.2 is in issue, the burden of establishing the facts justifying the assessment of the penalty is on the Minister.
The number of days in your cycle is calculated by counting the number of days from the beginning of one period to the beginning of the next period. If you have a short cycle, for example 21 days, and you bleed for 7 days, then you could ovulate right after your period.
In order for your normal period to come your body has to ovulate. Usually, your period will come about 12-16 days after you ovulate if you did not get pregnant. During the first few years after the onset of menstruation, many girls experience unpredictable menstruation. This is because they are not ovulating regularly.