My box of OPK says to start test on day 5 of your cycle (first response daily digital ovulation tests) ... I have a few different brands of tests (pictures included) which do you prefer? I was given the cheapie ones and the first response I got for $6 off eBay (still within expiration date) and the other one I bought new because I didn't know which would be best.. I started provera then clomid for the first time this cycle so I'm hoping I get lots of baby dust. We have been trying for about 8 years..