one cyst in baby's kidney. 37+3

Katherina

Hello everyone. I had my last us everithing fine with me and baby except the fact that the doc found a 10 mm cyst in baby's right kidbey in the lower portion. 

Anyone had or has experience with this? How serious this is?

Doc recomended a us after delivery but said it's not urgent. I read a ton of scarry things around the internet.

Please give me some input.

Tia!