Clinical bottom line
Long-acting reversible contraceptives (LARCs), including intrauterine devices (IUDs) and subdermal implants, are highly effective methods of contraception with increasing popularity due to their efficacy, safety, and ease of use. Recent evidence highlights their superior efficacy compared to short-acting methods and high levels of patient satisfaction. However, individual patient factors and preferences should guide contraceptive choice.
What the evidence shows
LARCs are among the most effective forms of contraception, with failure rates less than 1% per year. A systematic review and meta-analysis of contraceptive efficacy found that LARCs, including both hormonal and non-hormonal IUDs, as well as implants, have significantly lower failure rates compared to oral contraceptives, patches, and vaginal rings (Winner B, et al. Contraception 2012;86:496-504. PMID: 22795672).
A more recent study evaluated the continuation rates and satisfaction levels among LARC users. The study reported that over 80% of women using LARCs were satisfied with their method after one year, with continuation rates significantly higher than those using short-acting methods (Birgisson NE, et al. Obstet Gynecol 2015;126:947-955. PMID: 26444109).
Additionally, a 2020 clinical practice guideline from the American College of Obstetricians and Gynecologists (ACOG) supports the use of LARCs as first-line contraceptive options for most women, emphasizing their role in reducing unintended pregnancies and improving reproductive health outcomes (ACOG Practice Bulletin No. 186. Obstet Gynecol 2017;130:e251-e269. PMID: 29064972).
Caveats and uncertainty
While LARCs are highly effective and generally well-tolerated, they are not without potential side effects and limitations. Some users may experience irregular bleeding, especially in the initial months following insertion. Additionally, while rare, there is a risk of device expulsion or migration, particularly with IUDs.
Patient counseling is crucial to address misconceptions and manage expectations regarding side effects. Furthermore, while LARCs are suitable for most women, contraindications such as active pelvic infections or certain uterine abnormalities must be considered (Hubacher D, et al. Contraception 2009;80:133-138. PMID: 19631784).
How this may change practice
The increasing body of evidence supporting the efficacy and satisfaction associated with LARCs may encourage clinicians to recommend these methods more frequently as first-line options. This shift could lead to reduced rates of unintended pregnancies and improved patient satisfaction with contraceptive care.
Clinicians should engage in shared decision-making with patients, considering individual preferences, medical history, and lifestyle factors. Providing comprehensive counseling on the benefits and potential side effects of LARCs can empower patients to make informed choices about their reproductive health.