Exposição Ambiental; Ferro/sangue; Chumbo/sangue; Adulto; Anticoncepcionais Orais; Feminino; Humanos; Masculino; Fatores Sexuais

Biology; Comparative Studies; Contraception; Contraceptive Agents; Contraceptive Agents, Estrogen; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Methods--side effects; Correlation Studies; Ethinyl Estradiol; Examinations And Diagnoses; Family Planning; Hematocrit; Hematological Effects; Hemic System; Ingredients And Chemicals; Inorganic Chemicals; Laboratory Examinations And Diagnoses; Laboratory Procedures; Lead; Levonorgestrel; Men; Mestranol; Metals; Norethindrone; Norgestrel; Oral Contraceptives, Combined; Oral Contraceptives--side effects; Physiology; Research Methodology; Serum Iron Level; Serum Total Iron Binding Capacity; Statistical Studies; Studies; Women