yes they can tell if the baby is head down. my son has been head down since 20 weeks. Just had an ultra sound on Monday 26 weeks and he's still head down and right at my cervix.

it all depends on the little one. but they still have room to move so if they aren't head down its not a big deal because they can always Change positions. my LO wasn't head down until 35 weeks

they should tell you, if not I'd ask. at my last ultrasound she was head down and I'm only 27 weeks

yes they can be head down but they constantly change position so dont start worrying about it until like 33-34 weeks