Snapshot A 30-year-old G2P1 woman presents to the emergency room with contractions at 37 weeks. She previously had a baby boy via spontaneous vaginal delivery without complications. She had this delivery done in a foreign country, and obstetric records are not available. Her prenatal care has also been limited. On fetal ultrasound, it is noted that the fetus has ascites and soft tissue edema. She is immediately prepped for delivery. Introduction Overview login to view 2 more bullets Epidemiology Incidence login to view 1 more bullet Risk factors login to view 5 more bullets ETIOLOGY Pathogenesis login to view 6 more bullets Presentation Symptoms login to view 1 more bullet Physical exam login to view 3 more bullets Imaging Fetal ultrasound login to view 4 more bullets Studies Serum labs login to view 4 more bullets Rosette test login to view 1 more bullet Kleihauer-Betke test login to view 2 more bullets Differential ABO incompatibility login to view 2 more bullets Treatment Medical login to view 11 more bullets Complications Kernicterus secondary to hyperbilirubinemia login to view 4 more bullets Erythroblastosis fetalis login to view 2 more bullets