Worried about scan

Carly
Has anyone ever been told in their 20 weeks scan the baby had really little legs? The lady seem concerned about the baby having little legs and I have never heard of that b4. My baby has wedged its bum in my hip with its legs & head going up towards my belly button so it's not the bests place for it to grown & hopefully it's moves but she has really worried me pointing out that it had Little legs.