FJ, Kelly can probably give a better explanation, but as far as I know 3/5 engaged means three fifths engaged, but you can never really be 4/5 or 5/5....otherwise you'd be in labour! Also, the arrow poiting down means head in downward position.....

I asked my OB about this, and he suggested that babies move up and down, especially in subsequent pregnancies.....I had an image of Lexie bouncing on her head like she was on a trampoline, but I guess they must move a few inches up and down, just through motion of the amniotic fluid......?

Dunno. Maybe I am talking out my arse! Bit knackered this morning!