Has anyone experienced cord blood flow that was considered at the high end of normal at a 32 week scan?

I have to go back for another scan in two weeks to check if it is still the case but the OB didn't want to discuss it in detail until a second scan is done as he said things may be OK. I've spoken with a retired midwife who said that it's generally not a big issue, just that bubs will be getting too many red blood cells, and it would prepare the medical team to treat him when he's born. I've tried googling it and haven't come up with anything.