The Etonogestrel Implant in Adolescents: Factors Associated With Removal for Bothersome Bleeding in the First Year After Insertion

Amenorrhea in adolescents using the etonogestrel contraceptive implant

OBJECTIVE

Clinical factors related to development of amenorrhea in adolescents with the etonogestrel contraceptive implant are not well-understood. The purpose of this study is to describe what baseline clinical characteristics are associated with amenorrhea in adolescents with a contraceptive implant 12 months after placement.

STUDY DESIGN

This retrospective cohort study included 252 post-menarchal individuals aged 12-22 years with a contraceptive implant placed between 2016-2020. Data abstracted at insertion, three months post-insertion, and 12 months post-insertion included demographics, baseline bleeding pattern, prior contraception use, post-insertion bleeding pattern, and method discontinuation. We assessed possible predictive characteristics of our outcomes using bivariate and multivariable logistic regression analyses.

RESULTS

Twenty nine percent of patients were amenorrheic 12 months after placement. Patients who were amenorrheic at 12 months were more likely to be obese (41.1% vs 24.6%, p = 0.01), to have been amenorrheic prior to implant insertion (16.9% vs 5.4%, p < 0.01, to have used hormonal contraception immediately prior to insertion (42.5% vs 26.3%, p = 0.01), to have had the most recent contraceptive method being another implant (12.3% vs 3.6%, p = 0.02), and to have developed amenorrhea within three months after placement (22.2% vs 12.6%, p < 0.01). After multivariable regression analysis, only obesity (adjusted odds ratio [aOR] 2.2 95% CI 1.1-4.2) and amenorrhea at three months (aOR 3.6, CI 1.1-11.5) were associated with amenorrhea at 12 months.

CONCLUSION

Obesity and early amenorrhea were associated with 12-month amenorrhea in adolescents using the etonogestrel subdermal implant. Understanding this can help with contraceptive method selection and counseling for patients and providers.

IMPLICATIONS

Obesity and early amenorrhea with the etonogestrel contraceptive implant are associated with longer-term amenorrhea in adolescents using this method. These findings can aid providers with method selection and pre-insertion decision-making for adolescents considering contraceptive implant use, as well as continued counseling after placement.

Long-Acting Reversible Contraception for Adolescents: A Review of Practices to Support Better Communication, Counseling, and Adherence

Long-acting reversible contraception (LARC) methods, including levonorgestrel and copper intrauterine devices (IUDs) and the subdermal contraceptive implant, are the most effective reversible forms of contraception and thus are an important aspect of adolescent pregnancy prevention. While LARC efficacy, safety, and appropriateness are supported by major medical organizations and usage rates are increasing, overall LARC uptake among United States (US) adolescents remains lower than uptake of short-acting contraceptive methods. A better understanding of the barriers affecting adolescent LARC uptake and reasons for discontinuation could help facilitate effective communication. For example, learning how to improve adolescent-centered communication, shared decision-making, and motivational counseling strategies may be the first step to improving utilization rates. This narrative review includes three sections. First, this review will describe the history, mechanisms of action, and epidemiology of adolescent LARC use in the US and globally. Next, this review will describe key factors influencing adolescent LARC uptake, reasons for discontinuation, and multilevel barriers specific to adolescent LARC use. Finally, this review will characterize communication techniques and LARC counseling strategies for adolescents in the context of a reproductive justice approach set in the health belief model framework. The distinction between moving away from a presumptive counseling approach towards an adolescent-centered, shared decision-making approach to encourage parent-adolescent sexual health communication to lay the foundation of empowering adolescent reproductive autonomy should be the underpinning of all effective reproductive communication strategies.

Contraceptive Implant-Associated Bleeding in Adolescent/Young Adult Clinical Practice: Associated Factors, Management, and Rates of Discontinuation

PURPOSE

To identify factors associated with bothersome implant-associated uterine bleeding, and to evaluate the impact of bleeding management on implant discontinuation.

METHODS

We analyzed a quality improvement database of implant insertions (n = 825) at three adolescent/young adult programs and described individuals with and without reported bothersome bleeding. We utilized logistic regression to assess for factors associated with bleeding.

RESULTS

Implant recipient mean age was 18.9 ± 2.6 years, and 27% reported having subsequent bothersome uterine bleeding. Recipients had increased odds of reporting such bleeding if they had previously irregular menses (odds ratio [OR] = 1.36; 95% confidence interval [CI]: 1.11-1.68 irregular and infrequent, OR = 1.41; 95% CI: 1.07-1.86 irregular and frequent) or sought the implant for menstrual management purposes exclusively (OR = 1.67; 95% CI 1.42-1.96) or in combination with contraceptive need (OR 1.65; 95%: CI 1.57-1.72). Prior use of the progestin injection or implant was associated with lower odds of subsequent bleeding report (OR = 0.63; 95% CI: 0.54-0.73; OR = 0.54; 95% CI: 0.39-0.75, respectively). Medication management of bleeding was associated with the likelihood of implant discontinuation at 1 year compared to those with untreated bleeding (hazard ratio 1.98 times, 95% CI: 1.39-2.81). The implant was continued for 3 years in over 50% of recipients with ever-managed bothersome bleeding.

DISCUSSION

Individuals with historically irregular menses and those seeking the implant for menstrual management more often reported bothersome bleeding. Treating such bleeding with medication was associated with higher 1-year discontinuation rates, although many continued implant use for 3 years. Such findings may influence implant preinsertion counseling and/or postinsertion bleeding management.

Adolescent/Young Adult Long-Acting Reversible Contraception: Experience from a Multisite Adolescent Medicine Collaborative

OBJECTIVE

To report on long-acting reversible contraception (LARC) experience and continuation rates in the Adolescent Medicine LARC Collaborative.

STUDY DESIGN

LARC insertion data (682 implants and 681 intrauterine devices [IUDs]) were prospectively collected from January 1, 2017, through December 31, 2019, across 3 Adolescent Medicine practices. Follow-up data through December 31, 2020, were included to ensure at least 1 year of follow-up of this cohort. Continuation rates were calculated at 1, 2, and 3 years, overall and by Adolescent Medicine site, as were descriptive statistics for LARC procedural complications and patient experience.

RESULTS

Implant and IUD insertion complications were uncommon and largely self-limited, with no IUD-related uterine perforations. Uterine bleeding was the most frequently reported concern at follow-up (35% implant, 25% IUD), and a common reason for early device removal (45% of implant removals, 32% of IUD removals). IUD malposition or expulsion occurred following 6% of all insertions. The pooled implant continuation rate at 1 year was 87% (range, 86%-91% across sites; P = .63), 66% at 2 years (range, 62%-84%; P = .01), and 42% at 3 years (range, 36%-60%; P = .004). The pooled IUD continuation rate at 1 year was 88% (range, 87%-90% across sites; P = .82), 77% at 2 years (range, 76%-78%; P = .94), and 60% at 3 years (range, 57%-62%; P = .88).

CONCLUSIONS

LARC is successfully provided in Adolescent Medicine clinical settings, with continuation rates analogous to those of well-resourced clinical trials. Uterine bleeding after LARC insertion is common, making counselling imperative. Future analyses will assess whether the medical management of LARC-related nuisance bleeding improves continuation rates in our Adolescent Medicine patient population.