Hepatitis A and B vaccines
Hepatitis A is a virus that can lead to pregnancy difficulties such as preterm contractions or placental abnormalities. There are no known dangers to a developing fetus from the vaccination. Pregnant women who are at risk of developing hepatitis A should get the hepatitis A vaccine. Travel, health-related habits, medical problems, or exposure during an outbreak can all put you at risk for hepatitis A.
Hepatitis B is a dangerous illness that can cause chronic (lifelong) liver inflammation and can be transmitted to the fetus. Although many people were not immunized as children, a sequence of three hepatitis B vaccines is now routinely administered throughout infancy. There are no known dangers to the developing fetus from the vaccination. The hepatitis B vaccine is advised for pregnant women who are at risk of contracting hepatitis B during their pregnancy (for example, because they live with someone infected with hepatitis B) and for those who started the vaccine series before becoming pregnant.