Baby Measuring Big..

Chelsea

So at our scan last week our baby is measuring 32 weeks 4 days but I am only 29 weeks 4 days.. my question is... when a baby is measuring large.. is it just their body/size? Or do their internal organs also grow at the same pace as their body? I know that’s a weird question but I am wondering if the baby does come early if the inside organs would be 3 weeks ahead like the rest of the baby! Any body else have this experience??