For those who have had a chemical
I've seen the question floating around a lot.. Questions about ovulation after a chemical. Well, I had a chemical earlier this month and my period was a week late. I did my OPK's and I ovulated the same time I did before (cycle day) it wasn't on the same date, but it was cycle day 14. So, at least for me, being a week late on my period pushed my ovulation back according to my new period dates.