Bob has been head-down for a long time - just after 20 weeks or so. I figured out which way he was laying by feeling my tummy and learning his movements and hiccups - which gets easier as they get bigger. My midwife confirmed that I was right earlier this year. He moves a lot, and over the course of a weekend he turned from head down to head up, to transverse to back to head down LOL. That was one wild weekend in my tummy LOL