Levonorgestrel-Releasing Intrauterine System as a Contraceptive Method in Nulliparous Women: A Systematic Review

Cost-effectiveness analysis of levonorgestrel-releasing intrauterine system (LNG-IUS) 52 mg versus other long-acting reversible contraceptives for contraception in Spain

INTRODUCTION

Condoms and combined oral contraceptive pills are widely used in Spain with high failure rates. Long-Acting Reversible Contraceptive (LARC) methods offer better efficacy and adherence and reduce unintended pregnancies (UP) compared with short-acting reversible contraceptive (SARC) methods.

OBJECTIVE

To assess the cost-effectiveness of LNG-IUS 52 mg (Mirena®) versus other LARC for contraception in Spain.

MATERIALS AND METHODS

A Markov model with annual cycles and an eight-year time horizon was developed from the Spanish national healthcare system (NHS) perspective, considering costs for contraceptive method acquisition, health care resources (HCR) and UP. Effectiveness was based on failure and discontinuation rates. Sensitivity analyses were performed to test the model's robustness.

RESULTS

LNG-IUS 52 mg (Mirena®) resulted in lower costs and fewer UP versus LNG-IUS 13.5 mg (Jaydess®), Implant (Implanon®) and Copper IUD. LNG-IUS 52 mg (Levosert®) prevented the same UP events at a higher cost. LNG-IUS 19.5 mg (Kyleena®) was the most effective option, due to a lower discontinuation rate.

CONCLUSIONS

LNG-IUS 52 mg (Mirena®) is the least costly LARC, driven by lower acquisition costs and reduced HCR utilisation. Increasing LNG-IUS 52 mg (Mirena®) uptake in contraception could generate further cost savings for the Spanish NHS and reduce economic burden of UP.

Current Medical Therapy for Adenomyosis: From Bench to Bedside

Adenomyosis, characterized by the growth of endometrial tissue within the uterine wall, poses significant challenges in treatment. The literature primarily focuses on managing abnormal uterine bleeding (AUB) and dysmenorrhea, the main symptoms of adenomyosis. Nonsteroidal anti-inflammatory drugs (NSAIDs) and tranexamic acid provide limited support for mild symptoms or symptom re-exacerbation during hormone therapy. The levonorgestrel-releasing intrauterine system (LNG-IUS) is commonly employed in adenomyosis management, showing promise in symptom improvement and reducing uterine size, despite the lack of standardized guidelines. Dienogest (DNG) also exhibits potential benefits, but limited evidence hinders treatment recommendations. Danazol, while effective, is limited by androgenic side effects. Combined oral contraceptives (COCs) may be less effective than progestins but can be considered for contraception in young patients. Gonadotropin-releasing hormone (GnRH) agonists effectively manage symptoms but induce menopausal symptoms with prolonged use. GnRH antagonists are a recent option requiring further investigation. Aromatase inhibitors (AIs) show promise in alleviating AUB and pelvic pain, but their safety necessitates exploration and limited use within trials for refractory patients. This review highlights the complexity of diagnosing adenomyosis, its coexistence with endometriosis and uterine leiomyomas, and its impact on fertility and quality of life, complicating treatment decisions. It emphasizes the need for research on guidelines for medical management, fertility outcomes, long-term effects of therapies, and exploration of new investigational targets. Future research should optimize therapeutic strategies, expand our understanding of adenomyosis and its management, and establish evidence-based guidelines to improve patient outcomes and quality of life.

Levonorgestrel intrauterine system and breast cancer risk: An updated systematic review and meta-analysis of observational studies

Objectives

Levonorgestrel intrauterine sustained release system (LNG-IUS) is an intrauterine hormonal contraceptive device. Breast cancer (BC) was the most common type of cancer in women in the world in 2020. The relationship between LNG-IUS and BC is controversial. We conducted an updated meta-analysis (larger sample capacity and including Asian data) to explore whether LNG-IUS can increase the risk of BC.

Study design

We performed a thorough review of peer-reviewed publications from January 2005 through November 2022 using combinations of search terms for BC risk and LNG-IUS in the PubMed, Cochrane, Embase, Science Direct, and Web of Science databases. Studies reporting BC risk estimates among users of LNG-IUS were included according to the PRISMA criteria. Two authors independently evaluated all studies identified from the databases using Endnote software, and a third author resolved disagreements. The quality of evidence was evaluated using the Newcastle‒Ottawa Scale (NOS). A funnel plot was generated to assess publication bias.

Results

We identified 3029 studies; 12 studies were included in our systematic review, and 6 studies involving 261,221 women were included in our meta-analysis. Two subgroup analyses were performed for different study designs. A total of 190,475 women were included in the meta-analysis of cohort studies, and the results were RR = 0.80 (95% CI 0.57-1.11, Z = 1.33, P = 0.18 > 0.05). The meta-analysis of the case‒control studies included 70,746 women, and the results were OR = 1.38 (95% CI 0.98-1.94, Z = 1.85, P = 0.06 > 0.05).

Conclusions

Evidence of an increased risk of BC was not observed among LNG-IUS users.

Implications

There are inconsistencies in existing studies that prevent us from confirming whether LNG-IUS can increase the risk of BC. Our updated meta-analysis preliminarily suggested that LNG-IUS did not increase the risk of BC, providing evidence for more clinically safe use and thus providing a better choice for contraception.

Pain and ease of insertion of three different intrauterine devices in Brazilian adolescents: A participant-blinded randomized trial

OBJECTIVES

To compare pain and ease of insertion of the copper 380 mm², levonorgestrel 52 mg, and levonorgestrel 19.5-mg intrauterine devices (IUDs) in Brazilian adolescents.

STUDY DESIGN

We conducted a participant-blinded randomized trial at two clinics in Brazil. We enrolled 318 adolescents<19 years old in a 1:1:1 ratio from November 2021 to February 2022. We informed the adolescents about the IUD type inserted after they evaluated the pain associated with the IUD insertion using a Visual Analogue Scale and immediately after that the healthcare provider who placed the IUD evaluated the ease of the procedure.

RESULTS

The VAS pain level was significantly higher after the levonorgestrel 52-mg IUD placement, median and [interquartile range, IQ] 8.0 [4.0] than the copper 380-mm² IUD 7.0 [4.0], and the levonorgestrel 19.5-mg IUD 7.0 [6.0] (p = 0.001). The placement was easier after the copper 380-mm² IUD (87/106, 82.1%) and the levonorgestrel 19.5-mg IUD (91/106, 85.8%) when compared with the levonorgestrel 52-mg IUD (75/105, 70.7%). After multiple logistic regression analyses, the higher VAS pain scores were associated with the levonorgestrel 52-mg IUD (OR = 2.90), low number of pregnancies (OR -0.48), and with a history of dysmenorrhea (OR = 2.67).

CONCLUSIONS

The placement of the copper 380-mm² IUD and the levonorgestrel 19.5-mg IUD was associated with lower pain according to the adolescent and was easier according to the provider when compared with the levonorgestrel 52-mg IUD. However, the small observed differences may not be clinically relevant.

IMPLICATIONS

We found that the three types of IUDs were generally easy to place; however, mean pain scores were high during insertions. Our findings of high pain scores reinforce the need for interventions to reduce pain for adolescent IUD insertion.

User satisfaction with an intrauterine system containing 52 mg levonorgestrel: a Portuguese study

OBJECTIVE

To characterise patient satisfaction 6 and 12 months after insertion of a 52 mg levonorgestrel-releasing intrauterine system (LNG-IUS) in Portuguese women.

STUDY DESIGN

A non-interventional and prospective study was conducted in Portuguese women of reproductive age who had Levosert^® inserted. Two questionnaires (administered 6 and 12 months after 52 mg LNG-IUS insertion) were used to collect information on the patients' menstrual pattern, discontinuation rate, and satisfaction rate with Levosert^®.

RESULTS

A total of 102 women were enrolled, of which only 94 (92.2%) completed the study. Seven participants discontinued the use of the 52 mg LNG-IUS. At 6 and 12 months, 90.7% and 90.4% of participants, respectively, were either satisfied or very satisfied with the 52 mg LNG-IUS. At 6 and 12 months, 73.2% and 72.3% of participants, respectively, indicated that they were very likely to recommend the 52 mg LNG-IUS to a friend or family member. Most women (92.2%) continued to use the 52 mg LNG-IUS for the first year. The percentage of women who were 'much more satisfied' with Levosert^® than with their previous contraceptive methods was 55.9% and 57.8% at 6 and 12 months, respectively, per questionnaire assessment. Satisfaction was associated with age (p = 0.004), amenorrhoea (p < 0.003) and absence of dysmenorrhoea (p = 0.003), but not with parity (p = 0.922).

CONCLUSIONS

These data suggest that the continuation and satisfaction rates with Levosert^® were very high, and that this system is well accepted among Portuguese women. Patient satisfaction was driven by a favourable bleeding pattern and absence of dysmenorrhoea.

Hysteroscopic Endometrial Ablation: From Indications to Instrumentation and Techniques-A Call to Action

The development of minimally invasive techniques has led to the creation of innovative alternatives in cases where traditional methods are not applicable. In modern gynecology, hysteroscopy has become the gold standard for the evaluation and treatment of intrauterine pathology. Endometrial ablation (EA) is a procedure that uses different types of energy to destroy the endometrium and is currently used as an alternative technique in cases of heavy menstrual bleeding when medical treatment has failed and uterine preservation is desired. The aim of this review was to evaluate the feasibility, safety, and clinical outcomes of hysteroscopic EA as an alternative in patients with abnormal uterine bleeding. A detailed computerized search of the literature was performed in the main electronic databases (MEDLINE, EMBASE, Web of Science, PubMed, and Cochrane Library), from 1994 to June 2022, to evaluate the outcomes in patients with abnormal uterine bleeding (AUB) undergoing EA using hysteroscopic and non-hysteroscopic techniques. Only scientific publications in English were included. Twelve articles on the current use of endometrial ablation were included. Data on patient symptoms, tools used for EA, primary outcomes, and adverse events were recorded. EA should be considered an effective and safe approach in the management of patients with abnormal uterine bleeding caused by benign pathology, in whom medical treatment has failed or is contraindicated. Due to the lack of evidence, it would be interesting to determine whether EA would also have a role in the treatment of women with premalignant lesions, avoiding invasive surgical procedures or medical treatment in those patients for whom hysterectomy or the use of hormonal treatment is contraindicated.

The Effects of Hormonal and Non-Hormonal Intrauterine Devices on Female Sexual Function: A Systematic Review

Objectives

The goal of this paper was to review and synthesize the extant literature exploring the impact, if any, of copper (Cu) and levonorgestrel (LNG) intrauterine devices on female sexual function.

Methods

To review the literature, Medline, PubMed, and PsychINFO, were searched for primary research articles that were available in English and measured female sexual function in Cu- and LNG-IUD users. 35 quantitative and 2 qualitative research papers met criteria for inclusion in this systematic review. The 35 quantitative articles were then rated based on the STROBE statement.

Results

The included articles indicated a positive impact of LNG-IUDs on sexual pain, and a positive-to-neutral effect of IUDs on sexual desire, however more research is warranted. This review also found IUDs to be generally non-impactful on other domains of sexual function, including arousal, lubrication, orgasm, satisfaction, and overall sexual function.

Conclusions

As this review highlights that LNG-IUDs may improve sexual pain, future research should explore this connection further. Additional RCTs should also be conducted to confirm effects on sexual function with little bias. A better understanding of the impact of both Cu- and LNG-IUDs is necessary to expand upon this field of research and uncover any other benefits or detriments from IUDs.

Real-world satisfaction and menstrual bleeding pattern with available LNG-IUD among Spanish young women

OBJECTIVE

The aim of this study was to evaluate the satisfaction and menstrual bleeding pattern with levonorgestrel-releasing intrauterine systems (LNG-IUD) in young women.

METHODS

A prospective, multicentre, non-interventional study with 1-year follow-up was conducted in Spain. Participants were women between 18 and 30 years old who freely choose any available LNG-IUD for contraception. Satisfaction with LNG-IUD was measured with a 5-point Likert scale. Type of LNG-IUD, menstrual bleeding pattern and satisfaction with it, easiness of insertion and pain during procedure were collected.

RESULTS

A total of 555 women (37.3% parous, 62.7% nulliparous) (mean age 25.8 ± 3.5) completed the study. After 12 months, 92.4% of women were satisfied or very satisfied with the LNG-IUD, with no differences by parity status, type of IUD or baseline menstrual bleeding pattern. Satisfaction with the LNG-IUD correlated with satisfaction with menstrual bleeding pattern at 12 months. Up to 88.7% of women were satisfied or very satisfied with their menstrual bleeding pattern at 12 months in comparison to 41.5% at baseline (p < 0.001). Adverse events (AE)-related discontinuation rate was low (2.2%).

CONCLUSIONS

Satisfaction with LNG-IUD is very high among young Spanish women, regardless of parity and menstrual bleeding pattern at baseline.

Levonorgestrel-Releasing Intrauterine Device Use Can Be a Treatment Option in Symptomatic Patients with Isthmocele

Levonorgestrel-releasing intrauterine devices have been used for contraception and treatment of heavy menstrual bleeding. There is only limited data about the effect of this on isthmocele. Here, we aimed to evaluate the effect of levonorgestrel-releasing intrauterine devices in a larger study population with a longer follow-up as compared to the literature on symptomatic patients with isthmocele. A total of 29 patients with symptomatic isthmocele and inserted levonorgestrel-releasing device were included in this prospective study. All patients were included at January 2020 and followed for 18 months. Sociodemographic findings, laboratory parameters, premenstrual spotting, postmenstrual spotting, menorrhagia, dysmenorrhea, and pelvic pain related to isthmocele were recorded. In sonography, width, length, area of isthmocele, and residual myometrial thickness were determined. The frequency of symptoms during follow-up was compared between visits and also compared between groups according to residual myometrial thickness. Premenstrual spotting and pelvic pain were significantly reduced at 6th months (48.3 to 10.3%, p = 0.007 and 34.5 to 10.3%, p = 0.039, respectively) and no significant change was detected until the end of follow-up period. Postmenstrual spotting reduced at 6th months (96.6 to 34.5%, p < 0.001) and also significant change was detected between 6 and 12th months (34.5% vs 13.8%, p = 0.031). Menorrhagia and dysmenorrhea disappeared at 12th months. No association was found between residual myometrial thickness and the frequency of symptoms for each follow-up. Levonorgestrel-releasing intrauterine devices are useful and reliable therapeutic tools for symptomatic isthmocele patients who do not desire fertility, regardless of residual myometrial thickness.

The impact of awareness and attitudes towards long-action reversible contraceptives on the intention to use: a survey among youth with unintended pregnancies

PURPOSE

To understand the associations between awareness, attitudes, and intentions to use long-acting reversible contraceptives (LARCs) among youth seeking induced abortion services in Shanghai, China.

MATERIALS AND METHODS

A cross-sectional survey was carried out among 1,215 nulliparous youth with unintented pregnancies in 41 hospitals of Shanghai, China, through a stratified sampling process between January and May 2019. Multivariable logistic regression was used to test the associations between awareness, attitudes and intentions to use LARCs.

RESULTS

Around 70% of youth had heard of at least one method of LARCs. About 38% of youth perceived that the copper-bearing intrauterine contraceptive device (Cu-IUD) was safe; the rate was 8% and 7%, respectively, for levonorgestrel-releasing intrauterine system (LNG-IUS) and subdermal implants. Less than 40% of youth thought Cu-IUD was effective in contraception, and it was around 6% for LNG-IUS and subdermal implants. Overall, less than 8% of youth expressed intentions to use LARCs. Positive attitudes towards LARCs were highly associated with the intentions to use LARCs [adjusted Odds Ratio (OR) 3.22, 95% confidence interval (CI) 1.96-5.42, p < 0.001].

CONCLUSIONS

Low awareness and negative attitudes towards LARCs were found in this study, and the negative attitudes towards LARCs could contribute to low intentions to use LARCs among youth who had already experienced unintended pregnancies.

Expulsion and continuation rates of the levonorgestrel 52 mg intrauterine system was similar among nulligravid and parous users

OBJECTIVE

To compare the expulsion and continuation rates of the levonorgestrel (LNG) 52 mg intrauterine system (IUS) in a cohort of nulligravid and parous users.

METHODS

We conducted a retrospective cohort study that included 996 participants in whom we placed an LNG-IUS, and the participants were monitored for up to 5 years after device placement. We identify 498 nulligravid participants in the medical record database between 2012 and 2020. Each nulligravida was paired with a parous users who had an LNG-IUS inserted on the same day, just before or after the nulligravida. The Kaplan-Meier method and the log-rank test were used to compare the survival curves of the two groups.

RESULTS

By the fifth year of use, the expulsion rates were 7.6/100 and 8.2/100 women-years (W-Ys) and the continuation rates were 641/100 W-Ys and 65.4/100 W-Ys without difference among nulligravid and parous users, respectively (P = 0.782 and P = 0.564, respectively). We observed 29 and 31 expulsions among nulligravid and parous users, respectively.

CONCLUSION

Nulligravid and parous participants who used the 52 mg LNG-IUS showed similar expulsion and continuation rates during five years of use.

Intrauterine device use is safe among nulligravidas and adolescent girls

The use of intrauterine devices (IUDs), including the copper-bearing device and the levonorgestrel intrauterine system (LNG-IUS), is safe among nulligravidas and adolescent girls. However, several misconceptions limit their use in clinical practice; health-care providers are hesitant to prescribe IUDs, and several myths associated with their usage in nulligravidas and adolescents exist among both providers and women themselves. The high rates of unplanned pregnancies (which in many settings constitute a public health issue, primarily among adolescent females) can be attributed at least partially to lack of awareness and limited use of highly effective contraceptives such as IUDs. In this review, we discuss the role of non-hormonal and hormonal IUDs as effective contraceptives in nulligravidas and adolescent girls. We present a literature review of data that highlight contraceptive efficacy, side effects (including reasons for discontinuation), and continuation rates with the method. We searched the PubMed/MEDLINE, Cochrane Library, Embase, and Scopus databases for all articles published in English between January 1990 through September 2020. A large body of evidence confirmed the effectiveness of IUD/IUS, independent of age and parity. Studies showed a high expulsion rate among adolescents but not among nulligravidas. Additionally, bleeding patterns among adolescents and nulligravidas were similar to those observed among adults and parous women. The high early removal rates observed in adolescents were attributable to bleeding and/or pain, which indicate that compared with adults, adolescents are less likely to accept IUD-induced side effects. IUD placement is an excellent strategy to avoid the high rates of unplanned pregnancies in adolescents and nulligravidas. IUDs are more effective than short-acting reversible contraceptives with failure rates that are equivalent to those observed with permanent contraception. However, few long-term studies have investigated this category of women to definitively establish the role of IUD/IUS as effective means of contraception.