<正>Dear Editor,W e present a case of dexamethasone(DEX)intravitreal implantation(Ozurdex~;Allergan,Irvine,CA,USA)to treat diabetic macular edema(DME)during pregnancy.According to Pescosolido et al~([1]),pregnancy may promote the onset of diabetic retinopathy in about 10%of cases and may contribute to its worsening when already present,causing macular edema~([1]).Although one report has indicated that DME during pregnancy spontaneously regresses after delivery~([1]),others have reported that DME can persist and be associated with severe and persistent visual dysfunction~([2]).Treatment of diabetic retinopathy during