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    • Contraceptive choices, pregnancy rates, and outcomes in a microbicide trial. 

      Sibeko, Sengeziwe.; Baxter, Cheryl.; Abdool Karim, Quarraisha.; Abdool Karim, Salim Safurdeen.; Yende Zuma, Nonhlanhla. (Lippincott Williams & Wilkins., 2011)
      OBJECTIVE: Women who become pregnant during the conduct of biomedical human immunodeficiency virus prevention trials are taken off the study product for safety reasons. High pregnancy rates can compromise statistical ...