So this is my first month tracking my ovulation with these. I've been getting lines that's lighter than the control line but getting darker each time. My last one I took wasn't super dark so I just put in in my drawer with the others with the cycle day written on it. Later on I went to the bathroom and looked at them all (I have no idea why, guessing just hopeful to happen soon) and I looked at the last one I took and it was dark as the control line!