Hi @Anni2,
One of the experts will field this question as my knowledge is limited in this area. However, here are a couple of threads that I found on the subject that you could read up on until an expert can respond. I hope this helps.
-Paul
https://www.hepbcommunity.org/t/hepb-transmission-from-mother-to-child-when-low-viral-load/1311/2
https://www.hepbcommunity.org/t/having-children-and-hepatitis-b/166/2