Here is my test at 10 minutes, 20 minutes, and 3 hours. I'm guessing it is just an evap or indent.

Add Comment
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