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Body Composition Changes in Women Using LARC

Contraception; 2017 Apr; Silva dos Santos, et al

In women using long-acting reversible contraception (LARC), changes in body weight and composition over 12 months did not differ between copper intrauterine device (IUD) users and levonorgestrel intrauterine system (LNG-IUS) and etonogestrel implant (ENG implant) users among those with 12 months of continuous use, a recent study found. The prospective cohort study included a subgroup of women enrolled in the Contraceptive CHOICE Project who initiated the LNG-IUS, copper IUD, or ENG implant. Data from 149 participants were analyzed. Researchers found:

  • 85 LNG-IUS users, 31 copper IUD users, and 33 ENG users (mean age 25.9 years, 56.4% white, 67.6% nulliparous) were included.
  • Changes in body weight and composition did not differ between the groups, although lean body mass increased in LNG-IUS and copper IUD users.
  • Black race was associated with changes in total body mass.


Silva dos Santos PN, Madden T, Omvig K, Peipert JF. Changes in body composition in women using long-acting reversible contraception. Contraception. 2017;95(4):382-389. doi:10.1016/j.contraception.2016.12.006.