Basically my son has been measuring quite large since 20 weeks. Had a few complications do had more scans. At 20 weeks the head was on 95th centile, stomach on 90th I went for a routine growth scan at 32 weeks, the sonographer was a young girl, she done measurements and said head still 95th stomach was below 50th, legs just above 50th. Now she also said my placenta was posteria (at back) yet all through my pregnancy my placenta has been high anterior (at front). Dud to complication ended up going back 1 week later for scan with my consultant, she measured the stomach on the 95th centile and placenta high anterior! So my question is, can placentas move from front to back at 34 weeks? Also it's making me think that she must have made mistakes as the stomach has always been 95th centile, she mesured it below 50th but a week later consultant said it's definitely obove 95th. Do you think this sonographer was just useless?