I'm not 100% sure what you mean by your ferning pattern, sorry. Do you do the monitor reading at the same time each day and before you have had anything to eat or drink or brushed your teeth? These things can apparently make a difference.

If the entire light window is covered in fern shapes you are potentially fertile. If there are ferns over only part of the light window and dots or very faint shapes over the rest then it would be partial ferning and you are in a transitional stage which could mean that you are either leading up to a fertile patch, or leaving a fertile patch. If you see only dots and pebbles or lumpy shapes or nothing at all, then you aren't considered to be fertile.

What you need to remember too is that Maybe Baby is a secondary testing method and shouldn't be relied upon totally. Yes, many women do and conceive but many don't too and many women have no success at all with it.

The only way to be sure that you are ovulating is to temp. I temped at the same time as using Maybe Baby, OPKs and checking my CM and CP and can be sure that I ovulated as all of the signs agree.

Hope this helps.

Lisa