I have this. Anyone else? I can't find much recent stuff online other than often caused by blood transfusion (this is the case for me) and that they repeat bloods at 28 weeks to see if levels have risen. Mine are 1:4 at mo so fine but over 32 they monitor closely. I know that baby may get jaundice or in worse case blood transfusion or HDN. Any experiences out there? I'm worried but there is nothing I can do so kind of no point worrying. I feel a bit sad as now will just be stressed about birth (no 2) rather than ok with it as will be wondering what will happen to baby when he/she comes out. What I'd be keen to know is likelihood of problems occurring really, and if baby gets jaundice, what to expect.