Which day do I start testing with OPK?

Question

I have a 39 day cycle. Other than following the general rule of ovulating 14 days before my next period is due I dont know when I ovulate (I have tried looking for egg white CM but I havent noticed any). I have now got an OPK, which calender day would you suggest I start testing?

Thanks!!

Answer 1

I think you're right on starting on Sept 10th.  You might also want to keep track of your BBT so that you can tell when you ovuate.  This will help you in future cycles start the OPKs at the best time and it will also help you identify if you have any luteal phase issues.  Good luck!!!