4.4.2 Relationship between HBV DNA viral load of pregnant women at labor with HBV infection status in their children Research of Zou et al (2012) has shown a close relationship between HBV DNA load of pregnant women and HBV infection to the offspring, particularly when prenatal HBV DNA levels of mothers have been stratified according to the level: under 6; 6 - 6.99; 7 - 7.99 and ≥ 8 log10copies / ml, the proportion of children infected with HBV infection from mother was 0%; 3.2%; 6.7% and 7.6% with p <0.001.