(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.
Do not worry if this happens. You should ovulate again next month. In other cases ovulation does occur as usual, 14 days before the first period starts. That would be 2-4 weeks after the miscarriage. This means that you could be pregnant again within a couple weeks of losing your baby, without ever having a period.