<prompt> Failure rate of Copper IUCD is -3-40.01-0.030.5-1.54-5  <response>: Ans. is C i.e., 0.5-1.5 Pearl Index of IUD IUDs can be divided into three groups according to the pregnancy rate, indicating their contraceptive efficacy: 1 Group I pregnancy rates greater than 2.0 per 100 women-year: Lippes loop, Cu 7 T 200 2 Group II pregnancy rates less than 2.0 but more than 1 per 100 women-year: Nova T, ML Cu 250, and Cu T 220C 3 Group III pregnancy rates less than 1 mostly less than 0.5 per 100 women-year: Cu T 380A, Cu T 380S, ML Cu 375, and LNG 20 