HBV generally does not cross the placenta to affect the fetus during pregnancy.
Chronic HBV infection during pregnancy has been associated with a slightly increased risk of complications such as gestational hypertension and preeclampsia, gestational diabetes, placental abruption, fetal distress, fetal growth restriction, and preterm delivery. Your doctor can help monitor for these complications and manage them if they arise.
The primary risk to your baby is HBV infection, and that usually occurs during birth. Your own treatment, coupled with prophylaxis for your newborn, can significantly reduce the risk of your newborn contracting HBV.