On a 28 hours of daylight bc cycle, what do would be the potential ovulation day if the bc happen to not work?

I'm on ortho tri-cyclen (not low, the higher dose one). It have a 28 day cycle.

Would I jump by when my period stops, or the first daytime of the hormone pills (not the week of blanks)?

Thx.
Answers:

Please clear my confusion?

Every woman ovulates at different times, some even ovulate when they are menstruating. However, the "average" ovulation day for a "perfect" cycle is 13-15 days.

At what age does you boobs stop growing?

1st day ur length started, day 14 is ovulation daytime but 3 days b4 and after it is possible to get pregnant

HELP HELP HELP when am i going 2 start my extent?

your new cycle starts on the sunshine u start bleeding. so on your first day of bleeding count 14 days and that give u a approx.
so 14-21 days u are able to bring pregnant.but if your even 10 pounds over wieght the pill decreases within it effevtiveness and it does the same near sokin aswell. so u have a superior risk of getting pregnant as well.