I think your first month will be a bit of an experiment to see how you are with opks really. I never get squinters ( that make me chuckle!), mine are always completely negative until I get a faint line that gets slowly darker but is never darker than the control. Then within 12 hours its totally gone again and negative. But I know I ov as I've got preg so it works but just you will learn to read how they work for you. Good luck xxx