Why is glow wrong

GF
I did an opk test and it was positive with a smiley on Sunday 3/2 glow says I am not fertile till 3/8 if I wouldn't have been doing opk testing for lh surge I could have missed ovulation. Any thoughts, ideas or reasons why??

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors