title: Do the hepatitis antigens cross the placenta?
mesh_terms: D000906:Antibodies / Q000032:analysis; D000917:Antibody Formation; D005260:Female; D006511:Hepatitis B Antigens; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D008431:Maternal-Fetal Exchange; D010920:Placenta / Q000276:immunology*; D011247:Pregnancy; D014470:Umbilical Cord
chemical_list: D000906:Antibodies; D006511:Hepatitis B Antigens