I noticed with MB that my ferning seemed to have definite "cycles". I'm thinking that perhaps they are like an OPK and catch surges so that is why sometimes we don't see any ferning despite all of our other signs and symptoms telling us that we are, or have, popped the egg.

This cycle I am definitely PG, but didn't once see ferning on MB until yesterday when I thought I'd have a quick look to see what pregnancy looks like on the device.

I'd also agree that it's the size that counts. There is a huge difference between the fine, small ferning and the big, THICK ferning that signifies increased fertility. It's quite amazing when you see them for the first time!!

Lisa