3.3 Impact of LAM and TDF in late pregnancy on pregnant women 3.3.1 Efficacy of reducing HBV DNA viral load after treatment Average HBV DNA viral load of pregnant women after LAM treatment is 4.7 ± 1.3 (0 - 6.9), higher than after TDF treatment with 3.1 ± 1.7 (0 - 6.2) log10 copies / ml, this difference was statistically significant with p <0.001.