Some factors related to the perinatal transmission of HBV Among studied factors that are likely to relate mother-to-child transmission of HBV (including HBeAg (+) status of pregnant women at labor; HBV DNA viral load of pregnant women at labor >10 4 copies / ml; the delivery methods and the presence of HBsAg in colostrum) none was found significantly related to perinatal transmission of hepatitis B virus.