% chance of pregnancy

Kristi
I am wondering how accurate the % chance of pregnancy is on my glow calendar. it doesn't seem to ever change when I add in my ovulation tests or bbt. my period has synced up and is very accurate so that makes me wonder if the % chance of pregnancy is correct. my Dr. told me that I am most fertile the day my ovulation test says peak and the next day but my percentage on glow is always higher the days before.