Yes. Dear god, study female anatomy for chrissakes. For example, female gymnast will tell you that they don't get their periods in YEARS, depending on the person.
Sometimes, depending on the woman's situation, like being under stress, their periods don't come for a month or two.
For Suzuka, it might be that it never alarmed her since it might be a regular thing for her because of the vigorous training she was doing.
Or, in some times, did have a very light period, which can sometimes happened to pregnant women.