Can pregnant women receive the hepatitis B vaccine?

Apr 15, 2025 Source: Cainiu Health
Disease description:

I just found out I'm pregnant. I didn't receive the hepatitis B vaccine before pregnancy and am now a bit concerned. I would like to ask whether pregnant women can receive the hepatitis B vaccine. Will it have any impact on the baby in the womb?

Doctor's answer (1)
Dr. Zhang Lu

Generally, pregnant women can receive the hepatitis B vaccine, but it should be done under a doctor's guidance.

The hepatitis B vaccine is an inactivated vaccine and generally does not cause adverse effects on pregnant women or their fetuses. Considering the transmission routes and infection risks of the hepatitis B virus, the risk of contracting hepatitis B during pregnancy is relatively low. For pregnant women who have not previously been infected with hepatitis B and lack hepatitis B antibodies, receiving the hepatitis B vaccine can effectively prevent hepatitis B virus infection, reduce the risk of infection during pregnancy and childbirth, and also lower the likelihood of the newborn contracting hepatitis B after birth.

If a pregnant woman needs to receive the hepatitis B vaccine, it is recommended to complete the vaccination early in pregnancy, as the fetus's organs have not yet fully developed and the impact of vaccination is relatively minimal during this period. Additionally, antibodies generated after vaccination can pass through the placenta to the fetus, providing some protection for the newborn.

After vaccination, closely monitor for any physical symptoms and watch for abnormal reactions such as dizziness, palpitations, or rashes. It is advisable to rest more and avoid strenuous activities for several days following vaccination, and to avoid spicy, greasy, and allergenic foods in the diet.