title: Hepatitis B surface antigen in pregnant women.
abstract: Screening of HBsAg in 289 randomly selected normal pregnant women was done with counterelectrophoresis. Ten percent were found to be HBsAg positive. All of the 289 cord blood samples were HBsAg negative. Babies born to the HBsAg positive mothers were followed 2-8 months (average 3.5 months) after delivery and 37.5% were positive for HBsAg. Accordingly, the vertical transmission of HBsAg was postulated to occur during labor or after birth.
mesh_terms: D000410:Alanine Transaminase / Q000097:blood; D001219:Aspartate Aminotransferases / Q000097:blood; D001942:Breast Feeding; D002353:Carrier State / Q000453:epidemiology; D005260:Female; D005312:Fetal Blood / Q000276:immunology; D006509:Hepatitis B / Q000453:epidemiology; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000453:epidemiology
chemical_list: D006514:Hepatitis B Surface Antigens; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase