Ovulation Table What Is Follicular Study?

What is Follicular study? - ovulation table

I am TTC. I have PCOS. I) my time yesterday (January 29 and saw the doctor today. She asked me to take a table today for 5 days for ovulation. I am asked to conduct a study follicular 5th February. Is this the right time for follicular study? Is it necessary to do this month? I close in prayer UR.