title: Hepatitis B surface antigen, fertility and sex ratio: implications for health planning.
mesh_terms: D005260:Female; D005298:Fertility; D006115:Greece; D006285:Health Planning; D006511:Hepatitis B Antigens; D006801:Humans; D008297:Male; D008542:Melanesia; D012737:Sex Factors; D012744:Sex Ratio
chemical_list: D006511:Hepatitis B Antigens