From the picture from the 6th, baby looks like s/he's riding sideways, which is just perfect. Once you start seeing baby start lining up, and the start of even more udder development, we'll know she's getting closer. Also, you'll see less foal movement as the space becomes more cramped as baby grows and fills up the space. There will be less movement as she nears delivery, and she'll become more "slab-sided" as baby's spine lines up with mommas.
Right now she looks just perfect!