I've been using OPK and know to leave it 5-10 minutes ;depending on what brand you use) but;
I notice that the line 'develops' after about an hour.
I use the Femometer app and my reading was only 42 after ten minutes, one hour later the same test it's 60 and much darker. I've no idea what to consider as the 'true' reading. What do you think?
Thank you, from Clueless 🤷♀️ 😂