Antibodies--analysis 1 Antibody Formation 1 Antigen-Antibody Complex 1 Antigen-antibody Reactions 1 Autoantibodies 1 Biology 1 Blood Pressure--analysis mehr ... Cardiovascular Effects 1 Control Groups 1 Data Analysis 1 Diseases 1 Examinations And Diagnoses 1 Family Planning 1 Heart Diseases 1 Hemic System 1 Immunity 1 Immunologic Factors 1 Journal Article 1 Laboratory Examinations And Diagnoses 1 Male Sterilization 1 Physiology 1 Research Methodology 1 Research Support, Non-U.S. Gov't 1 Research Support, U.S. Gov't, P.H.S. 1 Sperm Agglutination 1 Sterilization, Sexual 1 Vas Occlusion 1 Vasectomy 1 weniger ...