Is the Hepatitis B test necessary

Unlike hepatitis A, this strain can be passed on to the foetus during childbirth. Nine out of ten infected babies, if left untreated, become chronic carriers and are at a risk of developing a more serious liver disease. This disease is generally tested in the fifth month.
 

Is Hepatitis B infection in the mother harm the baby

If the test results indicate that you do have hepatitis B, it is possible for your doctors to treat your baby right at birth, so that future complications are prevented.  That is why it is important to take the Hepatitis B test while you are pregnant.