0 05). HBV-DNA were mainly localized on the surface of the umbilical cord vessel and in the plasma of the cord vessel's endothelial cells. HBV-DNA in the cord vessel's endothelial cells nuclei was not seen.Conclusion There were HBV replication in the umbilical cord tissues of the died fetus. But expression of HBV-DNA in the umbilical cord tissues of the died fetus was not related with the HBV replication status in the pregnant woman veins.