Gynaecology & Obstetrics Contraception 290758a9 Least failure in sterilization occurs with : A Falope ring B Bipolar cautery C Unipolar cauterisation D Hulka clip High-Yield Explanation The success rates are best when clips and rings are used and worst with electrocoagulation. TEXTBOOK OF GYNECOLOGY SHEILA BALAKRISHNAN SECOND EDITION PAGE NO 393