(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.
If the egg isn't fertilized, it's shed along with your uterine lining during your period. Some women have menstrual cycles that are 28 days or longer, but others have cycles as short as 22 days. If you have a short cycle or long periods, you could ovulate right after your period ends. And since sperm can survive in your reproductive tract for up to five days, if you have sex during your period, it's possible that live sperm will be there when you ovulate, ready to fertilize the egg.