We had trouble conceiving and it worked for us, twice. Also for another two friends who were struggling.
I'd say it depends how long you've been trying. If you're getting really frustrated I think it's great as it puts a bit of science into it. Trying to have sex every other night for 18 months isn't actually that fun in the end (and inevitably when you're mid cycle your DP won't be up for it as he's so knackered )
If you've not been at it long then I'd probably not bother and enjoy trying more spontaneously a bit longer
If you have concerns that you're not ovulating or that you are ovulating too late in your cycle then it's worth using OPK'S like this, however there's not much point if you are having regular sex and no other concerns - all it does is tell you approximately the right days to TTC, there's still no more chance than just having sex every other day.
My friend was pg on her first month with one so I bought one after a year of trying. We are on our forth month but dp does work away a lot. One thing it has taught me is when I ovulate. Last month I ovulated on day 19 and this month day 13 without the monitor I just thought I ovulated on day 16 every month. I did try the cheaper opk's before spending £100 on one and it never showed a hormone surge so although not pg it shows when I ov.
Agree with rockchick. It worked for us, just because with work and life we couldn't always DTD every couple of days. Means that we didn't miss the crucial week. But you have to check whether you and your DP are comfortable being 'told' when to DTD, as some people find that it outs them off their stroke...
My advice is that they pop up on ebay a lot for about 30-40 quid. I couldn't have justified mine full price.
I used them a couple of cycles, but they never showed I was ovulating. I got pregnant in the second cycle of using them though, so I must have been ovulating. I also used Asda ovulation tests in the second cycle, which did show what might have been a positive (lines, so harder to tell) around the time I thought I ovulated.
Thanks for all the replies. My 10 mth old was a major surprise after 15yrs of infertility and I would so like to squeeze one more in before I become even more ancient. Time is against me and the quicker this happens the better.....
I think there are pros and cons, on the one hand it was good for me as I learned that I ovulated much earlier in my cycle than I had though (day 8/9/10 rather than the day 14 I presumed was the case). However, I did find it stressful, so stopped using it after 5 months, but was then able to bring our nookie forward to the time when I was likely to be ovulating (think I'd been leaving it too late before) in the months that followed and manged to fall pregnant (39 wks next week :-).
From recollection though, it doesn't guarantee that you are ovulating, just indicates that your body is trying to ovulate (your body may well release the right amount of hormones to trigger the kit, but ovulation may not take place), so it's not failsafe.