Retroplacental hematoma?

Anyone else diagnosed with a retroplacental hematoma and have a successful pregnancy?  Had our first US on 11-20, baby is measuring appropriately and heartbeat is in the 130's, but the doc said there was a small retroplacental hematoma that could reabsorb or get larger, resulting in miscarriage.  I'm not super familiar with this and just wanted some input with others going or already went through it.  Thank you!