Zoe - maybe baby (mb) is a little microscpe thingy and you wipe your first morning saliva on the lense. When you are fertile the dried saliva makes a fern-like pattern, when you aren't it's just like little spots or pebbles.

Sez - I just found out i am pg and was testing - prob every second day with mb but i was only getting the pebbles the day before i tested and got a +. But i do remember Lisa (Mumintaz) saying she looked at the website and some women can continue to get ferning when pg. It's frustrating that it's not consistent with every person - but if it's definately different from your usual cycle patterns then you may just be pg