Could Periods Be Regularized On Reduction In Weight?

I used to get regular periods (48kgs), but later became irregular-once in three months and then it stopped with weight gain (57kgs). when i hav tabs like Ovarl l or deviry, i get my periods if not I don't. I have PCOD's too. Will my period regularise if I reduce my weight? Does it mean that I am ovulating?