title: Letter: Hepatitis B in pregnancy.
mesh_terms: D000328:Adult; D005260:Female; D005333:Fetus / Q000276:immunology / Q000382:microbiology; D006511:Hepatitis B Antigens / Q000302:isolation & purification; D006515:Hepatitis B virus / Q000302:isolation & purification; D006801:Humans; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D011248:Pregnancy Complications
chemical_list: D006511:Hepatitis B Antigens