So I've been wondering all week why my ovulation tests are often not as dark as the test line and agonising over if there is something wrong. I mentioned it to my husband and he said 'Oh yeah I was talking to our doctor about that' - (our doctor trained and worked as a fertility doctor before he became a GP, so as you can imagine we have bombarded him with fertility questions!!). Basically what the fertility doc said was it's not about the darkness of the line. It's about the pattern of tests - so you are looking for the surge but the surge may not be as dark as the test line for some women. Everyone makes different amounts of LH. As long as you get a peak, it doesn't matter if it is as dark as the test line. The only way you can recognise your surge really is to do a month or two and get used to the darkness of your line and then also test the next day so you know it has gone down. Would have been useful to know! Don't know why my OH didn't think to mention it. He keeps coming out with these little gems he's got from our doctor but not until I've been tearing my hair out. Anyway, thought that might be useful to some people whose lines are never as dark as it says they should be on the tests. It's certainly put my mind at rest.