Discontinuation rates of intrauterine contraception due to unfavourable bleeding: a systematic review
BMC Women's Health volume 22, Article number: 82 (2022)
Levonorgestrel-releasing intrauterine devices (LNG-IUDs) and copper intrauterine devices (Cu-IUDs) offer long-acting contraception; however, some women may discontinue use within the first year due to bleeding pattern changes, limiting their potential. This systematic literature review investigated whether differences in bleeding profiles influence continuation rates in women in America, Europe and Australia.
Searches performed in PubMed and Embase were screened to identify publications describing bleeding patterns and rates of early IUC removal/discontinuation or continuation, descriptions of bleeding patterns, reasons for discontinuation, and patient satisfaction, acceptability and tolerability for LNG-IUDs and Cu-IUDs published between January 2010 and December 2019. The results were further restricted to capture citations related to ‘Humans’ and ‘Females’. The review was limited to studies published from 2010 onwards, as changing attitudes over time mean that results of studies performed before this date may not be generalizable to current practice.
Forty-eight publications describing 41 studies performed principally in the USA (n = 17) and Europe (n = 13) were identified. Publications describing bleeding patterns in LNG-IUD users (n = 11) consistently observed a reduction in bleeding in most women, whereas two of three studies in Cu-IUD users reported heavy bleeding in approximately 40% of patients. Rates of discontinuation for both devices ranged widely and may be as high as 50% but were lower for LNG-IUDs versus Cu-IUDs. Discontinuation rates due to bleeding were consistently higher for Cu-IUDs versus LNG-IUDs.
Bleeding is a common reason for discontinuation of Cu-IUDs and LNG-IUDs. The more favourable bleeding pattern observed in LNG-IUD users may be associated with a lower rate of early discontinuation of LNG-IUDs versus Cu-IUDs.
Intrauterine devices (IUDs) or intrauterine contraceptives (IUCs) are highly efficacious, highly acceptable and cost-effective . Women relying on IUDs have substantially lower rates of unintended pregnancy than those using short-acting and non-hormonal user-dependent methods of contraception . IUD use decreases unintended births, abortion, adolescent pregnancy and health care expenditure .
There are two main types of IUDs: levonorgestrel-releasing intrauterine devices (LNG-IUDs) and copper IUDs (Cu-IUDs). Although both are highly effective, they differ in key characteristics and mechanism of action . Both IUDs are associated with medically benign changes to menstrual bleeding pattern, and it is widely accepted that LNG-IUDs tend to reduce menstrual flow and dysmenorrhoea, whereas in Cu-IUD users, increased menstrual flow and dysmenorrhoea have been reported [5, 6].
Although IUCs have higher continuation and satisfaction rates than other contraceptive methods, a proportion of users who do not desire pregnancy discontinue use within the first year (early discontinuation), generally due to side-effects such as cramping and bleeding . In addition, the experience and satisfaction of women play an important role in whether they request early IUC removal. Early discontinuation typically results in uptake of less-effective contraception such as traditional methods (e.g. periodic abstinence or withdrawal) [8, 9]. It is therefore important to better understand the incidence of and contributors to early discontinuation. Given the recognised difference in bleeding profile between LNG-IUDs and Cu-IUDs, this systematic literature review was undertaken to investigate whether bleeding profiles influence continuation rates and the extent to which women request removal of either type of device as a result of unfavourable changes in menstrual bleeding. In order to identify all relevant evidence relating to this clinical issue, the review aimed to include a wide variety of different study types and not be limited by design, subject characteristics or definitions for study endpoints. With this in mind, performance of a meta-analysis was not planned.
The systematic review is reported in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Protocol (PRISMA-P) guidelines . Searches were performed in PubMed, and Embase to identify all relevant English language publications from 1 January 2000 to 28 November 2019. The search strategy aimed to identify publications describing bleeding patterns and discontinuation rates in women using LNG-IUDs or Cu-IUDs (see Additional file 1: Appendix 1). Publications were screened to identify studies (of any design) in healthy adult women reporting rates of early IUC removal/discontinuation or continuation, descriptions of bleeding patterns, reasons for discontinuation, and patient satisfaction, acceptability and tolerability. Specifically, the reviewers sought to identify prevalence of favourable and unfavourable bleeding patterns, differences in bleeding patterns among devices, variables that correlate with bleeding, and the association between bleeding and discontinuation. Publications reporting outcomes for women using IUCs for therapeutic indications and studies only describing contraceptive benefits were excluded (see Additional file 1: Appendix 2 for inclusion and exclusion criteria).
Screening based on title and abstract was performed by one researcher (Gaganpreet Kaur of Accuscript Consultancy) and all excluded references were checked by a second researcher (RC). Full papers were obtained and were screened by the researcher. A senior researcher (RH) reviewed the results for authentication and resolution of any uncertainties. Data from included references were extracted by one researcher (Gaganpreet Kaur) and were reviewed by a second researcher (RC). It was considered that continuation/discontinuation rates due to bleeding may be influenced by cultural differences in the perceptions regarding bleeding, with bleeding being seen as favourable and amenorrhoea being viewed negatively in some cultures, including countries in Asia, the Middle East and Africa. It was therefore decided at full-text review to exclude publications from Asia, the Middle East and Africa. Similarly, the review was limited to studies published from 2010 onwards, as changing attitudes over time mean that results of studies performed before this date may not be generalisable to current practice.
Overview of selected studies
A total of 53 publications met the inclusion criteria (Fig. 1); however, five publications did not report data according to IUC type and are therefore not discussed further; the remaining 48 publications are summarised in Table 1. Most publications were for distinct studies, but the single-arm phase III trial of LNG-IUS, ACCESS, was reported in four publications [11,12,13,14]; a single-arm European study of LNG-IUD was reported in two publications [15, 16]; and results from a randomised clinical trial (RCT) comparing an LNG-IUD 13.5 mg with 19.5 mg was described in two publications [17, 18]. Two publications by Korjamo et al. report data from an overlapping cohort of women using an LNG-IUD post medical termination of pregnancy [19, 20]. In addition, four publications reported results from the prospective, comparative cohort study, Contraceptive CHOICE Project; these each report data for different (but likely overlapping) cohorts so are considered as separate studies[21,22,23,24]. Of the individual studies, 17 were performed in the USA, 13 in individual European countries, and 5 were multinational; 4 were performed in South American countries, 2 in Australia and 1 in Canada. Most studies (70%) included both nulliparous and parous women. As anticipated, individual studies were very heterogeneous in their design, patient populations, descriptions of bleeding patterns, definitions for discontinuation, and measures of treatment satisfaction. It was therefore not considered relevant to assess the feasibility of performing a meta-analysis. A risk of bias assessment rated 8 of 17 case control/RCTs and 10 of 29 cohort studies as being of good quality (Additional file 1: Appendix 3).
Twelve studies (18 publications) report data for LNG-IUDs, either from single-arm studies, studies comparing the timing of placement of the device (three studies) or a study comparing two LNG dose levels [11,12,13,14,15,16,17,18,19,20, 25,26,27,28,29,30,31,32]. Ten studies (10 publications) report data for Cu-IUDs, including two comparing two different devices [33,34,35,36,37,38,39,40,41,42]. A further eight publications describe the results of eight studies comparing an LNG-IUD with a Cu-IUD [43,44,45,46,47,48,49,50]. Twelve publications (describing 12 studies) were identified that reported comparative results for an LNG-IUD versus the etonogestrel-releasing subdermal implant (ENG) [21,22,23,24, 51,52,53,54,55,56,57,58]. No studies were identified comparing a Cu-IUD with ENG. Most were prospective (31 studies), including RCTs and prospective observational studies; 9 studies were retrospective and there were 2 cross-sectional studies.
Eighteen publications (16 studies) reported on bleeding patterns in women following insertion of an LNG-IUD or Cu-IUD [11, 13,14,15,16, 18, 21, 25, 26, 28, 29, 32,33,34,35, 45, 49, 55]. Various means were used to enquire about bleeding patterns, including asking women to complete a daily bleeding diary, interviews at periodic study visits and completion of a questionnaire during study visits that included questions regarding bleeding patterns. Questionnaires and daily diaries included descriptions of bleeding patterns based on 3–5 levels of bleeding intensity.
Of the publications describing studies which included an LNG-IUD (n = 31), 11 (9 studies) report on bleeding patterns in women following insertion of the device [11, 13,14,15,16, 18, 25, 26, 28, 29, 32]. All consistently report a reduction in bleeding in most women, with some reporting amenorrhoea. Furthermore, all studies report reductions in bleeding and increases in the proportion of women with amenorrhoea over time. Cristobal et al.  found that 91% of women experienced a reduction in bleeding at 12 months after insertion of an LNG-IUD and 97% reported very limited bleeding at this time point. Carvalho et al.  observed that 36% of women reported amenorrhoea at the first visit (at least 2 months after having device placement) and this increased to 55% a year later. Only 7% and 14% of women at the two time points reported having regular menstruation each month. Achieving amenorrhoea and less bleeding were both associated with satisfaction. Darney et al.  reported increases in amenorrhoea rates over the first 9 months from 0.4% after 3 months to 19% at 9 months and this then remained the same at 12 months, while Schreiber et al. , reporting data for the same study, described increases from 0.4% at 3 months to 36% at the fourth quarter of the third year. Two further studies report on follow-up to 5 years after insertion of the LNG-IUD and observed rates of amenorrhoea in the fifth year of 42%  and 62%  respectively, with a further increase to 80% seen in the latter study for women using the device for over 5 years. Indeed, the latter study reported a negative correlation between duration of use and bleeding amount. A further study showed decreased bleeding over time following insertion of a subsequent IUD after 4–5 years .
Of the studies including Cu-IUDs (n = 26), only three specifically reported on bleeding patterns [33,34,35]. Yaron et al.  reported that 42% of women had heavy blood flow and 56% had moderate blood flow using the Ballerine MIDI IUD; and according to Bateson et al. , 43% of women were bothered by heavy bleeding and 35% reported being bothered by prolonged bleeding after using a T-framed Cu-IUD for 12 months. A further study reported a reduction in post-placement bleeding over the first 5 months from insertion of the CuT380A, as assessed using the Pictorial Blood Assessment Chart .
Four of the studies comparing LNG-IUDs with Cu-IUDs report differences in the bleeding patterns between the two types of device [21, 45, 49, 55]. Hall and Kutler  highlight the difference in bleeding patterns between the LNG-IUD and CuT380A by reporting bleeding symptoms at 6 months after insertion. At this time point, approximately a third of LNG-IUD users reported amenorrhoea and a third reported scant menstrual bleeding, whereas most (> 80%) women using the CuT380A reported heavy bleeding. Differences were also noted in the duration of bleeding with > 90% of the CuT380A group reporting bleeding lasting for ≥ 5 days compared with < 20% of the LNG-IUD group. A second study observed that 77% of women using the LNG-IUD reported lighter bleeding than experienced prior to use of the device compared with 4% of those using the Cu-IUD; furthermore, 67% of the latter group reported having heavier bleeding compared with before they started using the device (compared with 4% of the LNG-IUD group) . Modesto et al.  reported that during months 9–12, almost all women using a CuT380A had normal bleeding (relative to baseline) compared with approximately a third using an LNG-IUD. A further study found that 61% of LNG-IUD users versus 25% of Cu-IUD users reported lighter bleeding at 6 months compared with at 3 months, and 25% of LNG-IUD users compared with 15% of Cu-IUD users reported a reduction in the frequency of bleeding between these time points .
Rates of discontinuation
Rates of discontinuation overall or for bleeding were reported in 18 publications (14 studies) for women using LNG-IUDs [11,12,13,14,15, 17,18,19, 25,26,27, 29,30,31, 54, 56,57,58], 10 publications (10 studies) for women using Cu-IUDs [33,34,35,36,37,38,39,40,41,42] and 14 publications (14 studies) reporting comparative data for the two types of IUDs [22,23,24, 43,44,45,46,47,48,49,50, 52, 53, 55] (see Table 2).
Rates of discontinuation for any reason in studies of LNG-IUDs were reported in 11 publications (10 studies, including 4 that compared LNG-IUDs with ENG, but excluding those compared with Cu-IUDs) [17, 18, 20, 27, 29,30,31, 54, 56,57,58]. In seven of the studies, 12-month rates of discontinuation reported in individual studies ranged between 13 and 21% [17, 20, 27, 31, 54, 56], whereas lower 12-month rates were reported in a single-arm prospective observational study (2.5%) , and a prospective observational study comparing an LNG-IUD with ENG (6%) . A small RCT (n = 42) comparing immediate (intra-caesarean) versus routine postpartum placement reported rates of 40% and 59%, respectively, with the higher rate in women who had immediate placement reflecting a rate of expulsion of 20% . Two studies reported discontinuation rates at 36 months with rates being 40% and 47%, respectively [18, 57].
Three further publications reported rates of discontinuation due to adverse events (AEs) and these ranged from 2.5% at 12 months in a prospective study performed in four European countries  to approximately 20% at 12 months in a large multinational RCT comparing two LNG-IUD doses . The rate was 19% at 7 years in an analysis of long-term follow-up data from the large (n = 1751) single-arm phase III trial of LNG-IUS, ACCESS .
Fourteen publications (10 studies) reported the rates of discontinuation due to bleeding (which in some studies could include amenorrhoea) [11,12,13,14,15, 17, 18, 25, 29, 31, 54, 56,57,58]. Values from individual studies ranged from < 1% at 3 or 12 months in three studies [15, 25, 29] to approximately 2% in the ACCESS trial at (1–7 + years) [11,12,13,14] and a prospective observational study , and was approximately 5% at 3 years in an RCT comparing two doses of LNG-IUD [17, 18]. In four studies comparing LNG-IUD with implants, discontinuation rates due to bleeding in the individual studies ranged between 3 and 4% at 12 months (three studies) [54, 56, 58] and was 23% at 36 months in the fourth study . In most studies where reasons were reported, bleeding concerns were a minor proportion (11–30%) of the total cases of discontinuation [14, 15, 17, 25, 29, 31, 54, 56, 57]. However, in one study, half of the discontinuations (in 6% of patients due to any cause) were because of bleeding .
Ten publications (10 studies) reported rates of discontinuation/removal of Cu-IUDs for any reason [33,34,35,36,37,38,39,40,41,42], with rates from individual studies ranging from approximately 10% at 6 months in two studies [34, 40] to approximately 16–32% at 1 year in five studies [33, 35, 38, 41, 42] and 40% at 2 years and 3 years in two studies [35, 41]. Lower rates were reported for the VeraCept175 and Mini TT380 Slimline in two comparative studies, with 12-month rates being 16%  and 15% , respectively, for these Cu-IUDs compared with 32% for CuT380A. Rates of discontinuation due to bleeding were reported in eight studies [33, 35,36,37,38,39, 41, 42]. Rates were < 5% in a large 5-year retrospective study , a cross-sectional study performed in Brazil  and for the smaller Cu-IUDs, VeraCept175 and Mini TT380 Slimline [41, 42], whereas in other studies (including for the comparator group in the studies of VerCept175 and MiniTT380) the reported rates for individual studies ranged from 8.5 to 22%. Thus, in most studies, bleeding (and pain) was the reason for discontinuation in over a third of women choosing to have Cu-IUDs removed.
LNG-IUD versus Cu-IUD
Fourteen comparative studies (14 publications) report rates of discontinuation/removal for women using LNG-IUDs versus Cu-IUDs (four of which also compared IUCs with ENG) [22,23,24, 43,44,45,46,47,48,49,50, 52, 53, 55]. Nine of the 11 studies that reported rates of discontinuation for any reason reported higher rates for Cu-IUDs versus LNG-IUDs as did all three of the studies which reported rates of removal (for any reason). Thus, rates of discontinuation at 12 months in individual studies ranged from 4.3 to 19% for LNG-IUDs and from 3.3 to 26.8% for Cu-IUDs (Fig. 2). Similarly, a large retrospective observational study  reporting rates of discontinuation at 24 months observed a lower rate of 35.1% for LNG-IUDs compared with 42.3% for Cu-IUDs, while two studies reporting rates of removal by 36 months also reported higher rates for Cu-IUDs versus LNG-IUDs (33.1% vs 27.7% and 58.3% vs 32.6%) [43, 50].
Rates of discontinuation due to bleeding were reported in six studies and, in all but one, rates were at least two-fold higher for Cu-IUDs versus LNG-IUDs (range of values across the six studies: LNG-IUD, 0.1–4.0%; Cu-IUDs, 1.1–14.3%) [22, 43,44,45, 48, 55]. Thus, bleeding accounted for 1–14% of discontinuations in women using the LNG-IUD in five of the six studies versus 11–26% of discontinuations in those using a Cu-IUD [22, 43, 44, 48, 55]. The sixth study involved 109 patients, 7 of whom discontinued by 12 months, with bleeding accounting for 2 of the 3 patients who discontinued the Cu-IUD (out of 21 using this device) and none of 4 patients who discontinued the LNG-IUD (out of a total of 88 patients with an LNG-IUD) . Removals for bleeding accounted for 10% of removals by 12 months in LNG-IUD users and 15% of Cu-IUD users in the large retrospective observational study described by Bachofner et al. .
Nineteen publications (18 studies) report satisfaction ratings for the LNG-IUD or Cu-IUD [16,17,18, 21, 24, 26, 28, 30, 32, 33, 37, 38, 48, 49, 51, 54,55,56, 58] (Table 3). Nine studies (10 publications) of LNG-IUD included assessments of overall satisfaction with the device [16,17,18, 26, 28, 30, 32, 54, 56, 58]. Of these, six studies (seven publications) reported that > 90% of women were satisfied (somewhat/moderate or very/highly satisfied) with the device [16,17,18, 26, 28, 30, 32] and the other three studies reported 80–87% of women (across the three studies) to be satisfied [54, 56, 58]. Five studies (six publications) also assessed satisfaction with bleeding and reported 61–92% of women being satisfied (somewhat/very satisfied) [16, 18, 32, 54, 56] . Three studies of Cu-IUDs reported overall satisfaction ratings. These ranged from 66 to 95% [33, 37, 38]. None of these studies included assessments of satisfaction with bleeding. Six studies provide comparative satisfaction rates for LNG-IUDs versus Cu-IUDs [21, 24, 48, 49, 51, 55]. No studies reported statistically significant differences between the two types of IUC. Satisfaction ratings ranged from 79 to 94% for LNG-IUDs and 80–100% for Cu-IUDs.
Findings and interpretation
Bleeding changes resulting from contraceptive use are an important contributor to uptake and continuation of all contraceptive methods, including IUCs. However, limitations in reporting, differences in study populations and patient preferences make it difficult to set individual expectations about bleeding. We sought to determine a broader perspective on how bleeding affects discontinuation of IUCs, based on all available data from recent studies in relevant populations, as this can represent a useful clinical endpoint for patients who are deciding whether or not intrauterine contraception is right for them.
The findings from this systematic literature review suggest that the difference in bleeding profiles between LNG-IUDs and Cu-IUDs may account for some of the differences in discontinuation rates between the two types of device. This is based on a review of 48 publications (describing 42 studies) reporting on bleeding, discontinuation rates and/or satisfaction rates in women using LNG-IUDs or Cu-IUDs published over a 10-year period and performed in North America, Europe, South America or Australia.
Firstly, the review found that studies reporting on the bleeding profile following insertion of either type of device indicate that many LNG-IUD users experience a reduction in bleeding, with further reductions occurring over time and many women becoming amenorrhoeic. Indeed, approximately 90% of users experience a reduction in bleeding at 1 year with an LNG-IUD and most report further reductions in bleeding compared with their prior visit at 3, 6 and 12 months. In contrast, two studies reporting on bleeding in users of Cu-IUDs observed that approximately 40% of women experienced heavy bleeding or were bothered by prolonged bleeding. These differences were clearly demonstrated in five comparative studies reporting on bleeding profile according to type of IUC.
Secondly, the findings highlight the importance of the difference in bleeding profile to users, as illustrated by the discontinuation rates reported for LNG-IUDs and Cu-IUDs in 42 publications (38 studies) reporting rates of continuation/discontinuation or removal for either type of device. Most comparative studies reported higher rates of discontinuation for Cu-IUDs compared with LNG-IUDs. Although most studies were not designed to compare discontinuation rates and did not report whether differences were statistically significant, the overall trend seen across studies suggests that discontinuation rates are higher for Cu-IUDs and this is further supported by rates of discontinuation reported for either type of IUC in single-arm studies. Importantly, most studies (26 of 28) were observational or cross-sectional and are thus more likely to reflect real-world experience rather than being influenced by use in a trial setting.
Twenty-eight publications (24 studies) reported rates of discontinuation due to bleeding profile [11,12,13,14,15, 17, 18, 22, 25, 29, 31, 33, 35,36,37,38,39, 41,42,43,44,45, 48, 54,55,56,57,58]. In LNG-IUD users, discontinuation for bleeding was generally low and constituted less than a third of cases of discontinuation. In contrast, rates of discontinuation for bleeding tended to be higher with Cu-IUDs and bleeding was the reason for discontinuation in up to 26% of women discontinuing their Cu-IUD. This trend is supported by comparative studies reporting rates of discontinuation overall and due to bleeding for women using LNG-IUDs versus Cu-IUDs. Reassuringly, discontinuation due to bleeding appears to be a short-term (within 1 year or less) phenomenon, with relatively few women requesting removal in longer-term studies after the first year of use. Comparison of rates of discontinuation for any reason and for bleeding suggest that the latter is a significant cause of discontinuation in Cu-IUD users.
Understanding factors that contribute to a woman’s decision to continue or discontinue use of an IUC could help women in their choice of contraception and type of IUC . Few studies have specifically compared continuation/discontinuation rates for LNG-IUDs and Cu-IUDs or the role of bleeding profile in a women’s decision to request removal of the device, as revealed by the published literature identified in this systematic literature review. However, this review has revealed that there is a substantial body of published evidence reporting overall discontinuation rates and discontinuation rates due to bleeding that can be used to guide women and their physicians in the choice of contraception.
Discontinuation serves as both an objective endpoint and a clinically relevant one for women and their providers. In contrast, satisfaction with a contraceptive method is less precise, more subjective and highly individualised. Despite significant differences in bleeding, satisfaction rates were high in most studies, and rates overlap between LNG-IUD and Cu-IUD users. Providers therefore must work collaboratively with patients to help find the best method for them.
Strength and weaknesses
This review has a number of limitations that should be considered when interpreting the findings. Firstly, there are few studies directly investigating the relationship between bleeding profile and discontinuation rates; hence most of the relevant data identified were not from comparative or powered studies. Secondly, the studies identified differ widely in many aspects of design; participants; satisfaction ratings; and how bleeding profiles were quantified. Comparisons between studies therefore are made judiciously. This likely explains the wide range of rates of discontinuation observed overall and for bleeding between different studies of the same IUC. Thirdly, this review was limited to studies performed in North and South America, Europe and Australia. Thus, the findings may not be generalisable to other geographical regions. Indeed, it was decided to exclude publications from countries in Asia, the Middle East and Africa because, in many of these cultures, bleeding is seen as being favourable and would be unlikely to be a reason for discontinuing IUD use. Indeed, some studies indicate that contrary to findings from the US and Europe where increased bleeding is often a driver of discontinuation, in countries in Asia it is in fact a lack of bleeding which is cited as a reason for discontinuation . We do not suggest that the findings of this review are relevant for these geographical regions. Similarly, the review was limited to studies published from 2010 onwards as changing attitudes over time mean that results of studies performed before this date may not be generalisable to current practice. Lastly, we intentionally excluded LNG-IUD studies where there was a therapeutic indication, such as heavy menstrual bleeding or fibroids. However, not all studies specifically excluded these participants, and it is likely that some patients chose an LNG-IUD owing to problematic bleeding or desire for reduced bleeding. In contrast, persistence of menses may motivate some Cu-IUD users. The potential for bias due to confounding would result in an over-reporting of bleeding and discontinuation and may account for some studies with unexpectedly high reported rates of these outcomes. Furthermore, women with pre-existing heavy bleeding may be counselled away from a Cu-IUD and toward the LNG-IUD for contraceptive use. Despite these limitations, the study provides substantial evidence for differences in continuation rates for LNG-IUDSs and Cu-IUDs and the influence of bleeding profile on continuation.
Open questions and future research
The findings of this systematic literature review suggest that bleeding is associated with discontinuation of IUCs, and that the reduction in bleeding experienced by women following insertion of an LNG-IUD is associated with higher continuation rates compared with use of a Cu-IUD. Fewer women discontinue an LNG-IUD due to unfavourable or heavy bleeding when compared with those using a Cu-IUD (or, by comparison, an ENG implant). Among discontinuers, bleeding is a fairly commonly cited reason for removing an IUC. These results reinforce the need for good counselling and expectation-setting around bleeding with an IUC, and the continued search for ways to improve bleeding among IUC and long-acting reversible contraception users. The findings also indicate that interventions to improve early bleeding changes could have a significant impact on continuation of an IUC.
Availability of data and materials
Copper intrauterine device
Long-acting reversible contraception
Levonorgestrel-releasing intrauterine device
Levonorgestrel-releasing intrauterine system
Medical termination of pregnancy
Preferred Reporting Items for Systematic Reviews and Meta-Analysis Protocol
Randomised clinical trial
Systematic literature review
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The authors would like to acknowledge Highfield, Oxford, UK for providing medical writing assistance with funding from Bayer AG.
This research was funded by Bayer AG.
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DC has received grants and personal fees from Bayer AG, Merck and Allergan. RC is an employee of Accuscript Consultancy, Ludhiana, Punjab, India. RH is an employee of Accuscript Consultancy, Reading, Berkshire, UK. ST has served on scientific advisory boards for Allergan and Bayer AG. MM is an employee of Bayer AG, Berlin, Germany. Accuscript Consultancy was paid a fee for the conduct of the initial literature search and analysis.
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Costescu, D., Chawla, R., Hughes, R. et al. Discontinuation rates of intrauterine contraception due to unfavourable bleeding: a systematic review. BMC Women's Health 22, 82 (2022). https://doi.org/10.1186/s12905-022-01657-6
- Intrauterine device
- Menstrual bleeding