Prevention of Mother-to-Child (Perinatal) Transmission of Hepatitis B

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C Check her serum for hepatitis B surface antigen (HBsAg).

This answer is correct. All pregnant women should receive prenatal testing for hepatitis B during pregnancy by screening serum for the presence of HBsAg, regardless of risk factors or immunization history. Screening women early in pregnancy for the presence of HBsAg is the first step in preventing perinatal HBV transmission, as maternal HBsAg status HBV determines what prophylaxis should be given to her newborn and the level of follow-up that both mother and child should receive.

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