Definitely trust it, the CBEFM will give you allot more days in your fertility window which is what can help you get pregnant quicker.... opk's are great and all, charting is wonderful as well but it doesn't tell you anything until after you ovulated... so with the CBEFM it measures 2 hormones instead of just one like opk's. So BD now, now, now!!! Tomorrow, the next day and so on... even after you get a peak then go back down to high before going back to low you need to keep bd'ing Pamela.

honey!!!