Hi all,
Just sharing my experience with the OPKs. I presently use the 20miu ones from Ah Huat P/L. However, although the instructions state that your 2nd line must be darker, I find that for me, sometimes a faint line is also a sign. When I see a faint line, I will then test with the more sensitive OPK and it's usually positive. This is very consistent when I see EWCM 1-2days later as well.
I'm still TTC-ing but thought I'd share my experience. [IMG=http://www.singaporemotherhood.com/forumboard/clipart/happy.gif]