TABLE 1. Comparing the LNG IUS and the Copper IUD
Points of ComparisonLNG IUSCopper IUD
Main differenceHormonal (levonorgestrel)Nonhormonal
Main effects on menstruationGenerally decreasesmenstrual blood lossGenerally increasesmenstrual blood loss
Duration of use5 years10–12 years
Noncontraceptive benefits (stemming from reduced uterine bleeding)Treats menorrhagia, increases hemoglobin, and likely alleviates anemia and problems with uterine fibroids
EffectivenessBoth in the highest tier of contraceptive effectiveness
Continuation ratesBoth have similar, high continuation rates
  • Abbreviations: IUD, intrauterine device; LNG IUS, levonorgestrel intrauterine system.