The darkness of the line doesn't mean much to be honest. I would stop testing as it can get obsessive and you'll panic if the line isn't as dark
Yes it does have a limit. Did you know it can also be so positive that the test line will disappear! It's called the hook effect, doesn't usually happen until around 6 to 7 weeks though.
@Charley That’s cool! I knew it could pull some of the color but I didn’t realize how much
@Louise nice! What dpo?
Can’t be 100% certain. According to LMP I’m 6 weeks today (12th) so guessing 24ish on the dpo
Mine didn't get much darker than what you have here. I took another one around 7 weeks and was maybe slightly darker than your 17DPO tests