M
Maid Marian
Guest
I've read various things about faint +ve lines ... I think that the line should get gradually darker as you go along, cos the HCG increases, right? But I also read that with some HPTs the line just won't get darker because they only measure up to a certain level of HCG. I'm using First Response HPTs, and over 4 days, the lines have changed fractionally, but not a lot. I wondered if anyone knows what level of HCG they measure? I'm worrying now that something's not right :/