I've tried the ones at Fertility Naturopath as well and the OPK's wouldn't detect ovulation and the HPT's gave me 2 definate false positives. There was a pink line within the 10 mins but all the other test I did were -ve, which was the correct reading because I wasn't pg.

I wish they did work for me though as they are at a great price.

Thanks for your suggestions, I might try downunder's goods.