Two long-acting reversible contraceptive devices, the levonorgestrel intrauterine system and etonogestrel subdermal implants, are well-tolerated and are associated with few serious adverse effects, according to a new study by UTMB’s Dr. Abbey Berenson. The study also found that 88% of the teenagers who used either contraceptive continued to use it for at least 12 months. Berenson and her coauthors found that relatively few US women use long-acting reversible contraception. To compare the use and complications of two such contraceptive methods, the researchers reviewed health insurance claims. "We found that both methods were well tolerated among women of all ages with few side effects and that continuation rates exceeded those observed with other contraceptive methods," Berenson and colleagues conclude. "Results from this direct comparison will help healthcare providers better counsel their patients about the benefits of both types of contraception as well as help patients choose which method best fulfills their needs."