Period date change?

Alaina • Ttc my third and my husbands second. Wishing the best if luck to everyone out there!
For most of the month glow predicted my period starting on July 3 then within the last week it bumped it to the fourth. I've never had this happen before, I wondered if anyone else had, and 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