Since mother-to-child transmission of hepatitis B is related to the value of HBVDNA, patients who consult for mother-to-child transmission of hepatitis B should have their HBVDNA checked in addition to the five hepatitis B tests. For those with undetected HBVDNA and HBVDNA below the sixth power of 10, no special intervention is needed during pregnancy (no hepatitis B immunoglobulin and oral antiviral drugs). Immunoglobulin 100-200 units. Hepatitis B vaccine 10 micrograms (at birth, 1 month, 6 months) Hepatitis B vaccine and hepatitis B immunoglobulin are administered at birth to the quadriceps (the muscle in front of the thigh) on each side, preferably not at the deltoid muscle. (Because BCG vaccination is given at the deltoid muscle). Newborns with undetectable HBVDNA can be breastfed if they are vaccinated with hepatitis B immunoglobulin, but breastfeeding is temporarily stopped after nipple rupture. For breastfeeding, it is recommended that newborns be vaccinated with 100-200 units of hepatitis B immunoglobulin in about 20 days. The risk of mother-to-child transmission is increased by breastfeeding in HBVDNA-positive patients, and it is up to the patient to decide whether to breastfeed or not. If the child is born with regular hepatitis B vaccination and hepatitis B immunoglobulin, vaginal delivery does not increase the chance of infection. The risk of transmission by breastfeeding is lower for those with undetectable HBVDNA than for those with positive HBVDNA. You can check the Hepatitis B test at 7 months of age to see if your child is successfully blocked.