<prompt> Hofbauer cells are associated withSingle umbilical aeryMaternal diabetesEarly pregnancyErythroblastosis foetalis  <response>: Hofbauer cells are oval eosinophilic histiocytes with granules and vacuoles found in the placenta, which are of mesenchymal origin, in mesoderm of the chorionic villus, paicularly numerous in early pregnancy. 