Article Text

Original research
Maternal health and Indigenous traditional midwives in southern Mexico: contextualisation of a scoping review
  1. Iván Sarmiento1,2,
  2. Sergio Paredes-Solís3,
  3. Anna Dion1,
  4. Hilah Silver1,
  5. Emily Vargas4,
  6. Paloma Cruz2,
  7. Juan Pimentel1,5,
  8. Germán Zuluaga2,
  9. Anne Cockcroft1,
  10. Neil Andersson1,3
  1. 1Department of Family Medicine, McGill University, Montreal, Québec, Canada
  2. 2Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia
  3. 3Centro de Investigación de Enfermedades Tropicales - CIET, Universidad Autónoma de Guerrero, Acapulco, Guerrero, Mexico
  4. 4Unidad de Posgrados e Investigación, Universidad Autónoma de Yucatán, Merida, Yucatán, México
  5. 5Facultad de Medicina, Universidad de La Sabana, Chia, Colombia
  1. Correspondence to Dr Iván Sarmiento; ivan.sarmiento{at}mail.mcgill.ca

Abstract

Objectives Collate published evidence of factors that affect maternal health in Indigenous communities and contextualise the findings with stakeholder perspectives in the Mexican State of Guerrero.

Design Scoping review and stakeholder fuzzy cognitive mapping.

Inclusion and exclusion The scoping review included empirical studies (quantitative, qualitative or mixed methods) that addressed maternal health issues among Indigenous communities in the Americas and reported on the role or influence of traditional midwives before June 2020. The contextualisation drew on two previous studies of traditional midwife and researcher perspectives in southern Mexico.

Results The initial search identified 4461 references. Of 87 selected studies, 63 came from Guatemala and Mexico. Three small randomised trials involved traditional midwives. One addressed the practice of traditional midwifery. With diverse approaches to cultural differences, the studies used contrasting definitions of traditional midwives. A fuzzy cognitive map graphically summarised the influences identified in the scoping review. When we compared the literature’s map with those from 29 traditional midwives in Guerrero and eight international researchers, the three sources coincided in the importance of self-care practices, rituals and traditional midwifery. The primary concern reflected in the scoping review was access to Western healthcare, followed by maternal health outcomes. For traditional midwives, the availability of hospital or health centre in the community was less relevant and had negative effects on other protective influences, while researchers conditioned its importance to its levels of cultural safety. Traditional midwives highlighted the role of violence against women, male involvement and traditional diseases.

Conclusions The literature and stakeholder maps showed maternal health resulting from complex interacting factors in which promotion of cultural practices was compatible with a protective effect on Indigenous maternal health. Future research challenges include traditional concepts of diseases and the impact on maternal health of gender norms, self-care practices and authentic traditional midwifery.

  • maternal medicine
  • primary care
  • public health
  • social medicine
  • statistics & research methods

Data availability statement

All data relevant to the study are included in the article or uploaded as supplementary information. All relevant data are within the paper and supporting material.

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Strengths and limitations of this study

  • Contextualising published evidence with stakeholder perspectives added value in understanding influences on maternal health in Indigenous communities.

  • Fuzzy cognitive mapping contrasted and combined knowledges in a transparent and traceable way.

  • An adaptation of Harris’ discourse analysis synthesised quantitative, qualitative and mixed study results into a unified soft model.

  • The weights of the relationships in the final maps are best interpreted as grades of consensus about influence, not as pooled estimates of impact.

  • Additional discussion with other groups of local stakeholders is still relevant and necessary.

Introduction

Modern perinatal care aims to ensure that all women give birth in a safe environment. This is especially relevant for people living at the periphery of the health system where risks are usually higher.1 Cultural differences matter. What constitutes a safe environment in one culture might be inappropriate or unacceptable in another.2 3 Community engagement can help service delivery to adjust to specific cultural and local conditions, thus increasing universal access to safe birth.4

In Latin America, failure to incorporate cultural dimensions in delivery of perinatal care has generated resistance to health services among Indigenous peoples.5 Despite political recognition of Indigenous traditions, there is a high level of mistrust between Western health services and Indigenous traditional healthcare. This mistrust reduces the effective access of Indigenous women to Western healthcare.6

There is little published evidence on the impact of traditional healthcare practices, including traditional midwifery. Their formal evaluation faces methodological challenges,7 including scarcity of epidemiological evidence on traditional practices in their own right, small size and remoteness of many Indigenous groups, and lack of understanding about the roles of different traditional practitioners. Systematic reviews of available literature, none of which were conducted by Indigenous researchers, suggest improvements in maternal and child health outcomes from interventions that involved Western retraining of traditional midwives.8–13 Kruske’s 2004 review recognises, however, that retraining traditional midwives ignores their social and cultural role and assumes local knowledge is a barrier to improving maternal health.14

International recommendations in the last two decades emphasise increasing access to Western healthcare.15 This ignores traditional skills and practices, to promote a new cadre of younger literate women trained in limited aspects of Western perinatal care.15 16 This training, often centralised and away from Indigenous communities, neglects historical, economic, geographical and sociocultural factors and the diversity of stakeholders in Indigenous communities.4 The consequence for many Indigenous women is accentuation of their already limited access to services17 and, since the trainees do not have the skills to deal with obstetric crises, poor health outcomes.14

Rationale and objectives

This study was part of a larger initiative on the role of traditional midwifery in safe birth. The first of its two objectives was to collate and assess published evidence that identifies influences, including traditional midwives, on maternal health in Indigenous communities in the Americas. The second objective was to contextualise the literature with local perspectives and experience, by combining a scoping review with stakeholder cognitive mapping.

Methods

A conventional scoping review identified influences on maternal health in Indigenous communities in the Americas in the published and grey literature.18 Fuzzy cognitive mapping (FCM) portrayed the literature findings in a graphic format that could also portray knowledges from other sources.19 Each fuzzy cognitive map, from the literature or authored by the stakeholders, represents presumed causal relationships. Each concept is a node linked with arrows (edges) to its outcomes or consequences.20 Each relationship in the map receives a weight to indicate the strength of the influence that each node exerts on another. The cause-weighted arrow-outcome set summarises each causal statement, which together make up a complex knowledge network. The simplicity of each set allows juxtaposition of different knowledge sources in a comparable format.

We used graph theory and fuzzy logic rules to summarise the maps.21 Developed in the late 20th century, fuzzy logic deals with statements that incorporate degrees of certainty (fuzziness) instead of crisp distinctions between, in this case, causes or no causes of an outcome.22 This allowed us to estimate the influence of each node on other nodes throughout the map,23 effectively turning it into a knowledge network in a sharable format with other knowledge networks.

We contrasted the scoping review map with stakeholder perspectives to make sense of published evidence in the experience of local stakeholders.24 The shared FCM format highlights similarities and differences between maps and the eventual combination of the resulting knowledge networks.

The scoping review

The scoping review25 followed Arksey and O’Malley’s methodological framework26 and the updated guidelines by Peters et al.18 The reporting follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews Checklist. The review sought to answer the question: What factors, including the role and influence of traditional midwives, promote or reduce maternal health in Indigenous settings in the Americas and what is the relative weight of their influence?

Eligibility criteria

We included empirical studies on maternal health, which reported on the role or influence of traditional midwives and were conducted in Indigenous communities in the Americas. This geographical restriction was intended to limit the heterogeneity of cultural practices in other continents. The published protocol contains a detailed description of eligibility criteria.25 We did not limit publication dates, and we included studies in any of the main languages spoken in the Americas (English, Spanish, French or Portuguese). The review excluded theoretical models or editorials that did not report empirical findings and ethnographies that did not report maternal health outcomes.

Information sources

Supported by a librarian specialised in Indigenous health, in June 2020, we searched Cumulative Index to Nursing and Allied Health Literature (CINAHL), Scopus, Latin American and Caribbean Health Sciences Literature (LILACS), Medline, Embase and Google Scholar databases. We used Google to search for unpublished studies. The search strategy accompanies the protocol.25 To identify additional unpublished reports, we used the Canadian Agency for Drugs and Technologies for Health procedure. A librarian based in Colombia extended the search strategy to include other 15 databases specific to research in Latin America (CEPAL, Repositorio FLACSO, BVS, BVS MTCI, PAHO, PAHO IRIS, Red de repositorios latinoamericanos, La referencia Dialnet, Redalyc, BDCOL, Biblioteca digital Bogotá, CLACSO, BRISA, WHO, WHO IRIS). Hand-searching of the references in the included documents identified additional studies.

Study selection and data extraction

Using EndNote V.X9.027 and Rayyan,28 we eliminated duplicates through screening article titles and abstracts. Three independent reviewers (IS, EV and PC) identified eligible studies and extracted data using predesigned instruments. After an initial selection, we reviewed full-texts for eligibility and hand-searched the reference lists to identify additional documents. Before starting data extraction, IS, EV and JP finalised the extraction instrument in two rounds using a random sample of five references each time. The instrument collected information about each study (year, authors, design, country, language and participants), the maternal health outcome reported, characteristics of traditional midwives involved and approach to cultural differences. The second part of the instrument listed all influences on maternal health and their relationships. A 3-column edge list listed: initiating factor, landing factor and sign of the relationship (-1 or +1) with one row for each relationship. If the study reported that an increment of one factor increased another factor, the relationship was positive (+1); if it decreased the second factor, it was negative (−1). If the study reported additional influences between factors, we documented them using the same format. For quantitative studies, we included relationships that were supported by effect estimates or higher proportions of the outcomes among exposed (significant at the 5% level). For qualitative studies, we included relationships indicated by a statement supported by quotes or reported direct observations that suggested the increment of one factor could lead to an increment (positive relationship) or reduction (negative relationship) of the landing factor. We assessed the quality of aspects of included studies using the Mixed Methods Appraisal Tool (MMAT).29 Because the revised MMAT tool does not generate quality measures for each study, we did not incorporate its results into the analysis of the maps described below but followed the recommendation of describing the results of each criterion.

Data mapping

We used FCM to portray influences mentioned in the literature as an edge list with the origin and landing concepts in the first two columns and the weight of the relationship in the third column, as described above. We created an edge list for each included study and, using an algorithm developed by Šajna30 in CIETmap V.2.2,31 calculated the fuzzy transitive closure to identify the influence of each node on other nodes when taking into account all the relationships mentioned in the study.30 An operator-independent procedure inspired by Harris’ original discourse analysis32 used the relative frequency of each relationship (node, arrow, node) across all the transitive closure maps to calculate its weight.33 Because this step occurs after calculating transitive closure, the relative frequency incorporates both the relationships reported in the articles and those identified with the algorithm. In this application of Harris’ discourse analysis, the relative frequency of a relationship between two nodes is taken to reflect the function of the initial node in the map, in a similar way that linguists can identify the function of a word in the structure of a text. In FCM, the structural function of the node is causality. The initial node often influences the occurrence of the landing node according to the sources of the map. Viewing the literature in the scoping review as analogous to a text in an exercise on linguistic meaning, a relationship present across multiple articles in the literature would thus be stronger than a relationship identified in fewer articles. Causal interpretation of the relationships in the map is restricted to the set of data from which the relative frequency was derived, and they are not exhaustive proof of causality.

Two researchers (IS and PC) inductively classified the factors emerging from the scoping review into categories in reiterative rounds,34 and then condensed the factor level relationships into a category level map to facilitate visualisation and interpretation.33

We used degree centrality measures in the free software yEd to further characterise the role of each factor.35 Outdegree centrality calculated the total influence each node has in the system, the sum of the absolute values of the weights for each node’s outgoing edges. Indegree centrality indicated the total influence that each node receives using the same calculation with the incoming relationships.

Contextualising the evidence from the scoping review

The contextualisation of available evidence combined three sources of information—traditional midwives,36 intercultural researchers working on perinatal care33 and the available literature—to identify the influences on maternal health in Indigenous communities in southern Mexico. Traditional midwives contributed a cultural perspective grounded in Guerrero local conditions, and intercultural researchers shared their understanding of the issues, based on their years of bridging the relationships between Western institutions and Indigenous communities in their international work in America, Africa and Asia.

Dion’s Weight of Evidence is a procedure for stakeholders to interpret, expand on and prioritise findings from evidence syntheses.24 We adapted this method by summarising the scoping review evidence as a fuzzy cognitive map with operator-independent weights based on Harris’ discourse analysis. As described elsewhere, traditional midwives and intercultural researchers generated cognitive maps of their knowledge of factors affecting maternal health in Indigenous communities.33 36 The production and analysis of stakeholder maps preceded (and were published before) this review, intended as an independent basis for contextualisation of the literature on safe birth and a contribution in its own right to the understanding of how change might be promoted in Indigenous communities in Guerrero. The FCM of the literature review reflected empirical results of the selected studies without reference to the stakeholder maps. We compared the literature with stakeholder knowledge using a pattern matching table to identify agreement and differences across knowledge sources. This arranges each map as a column and the factors or categories in each map that influence the outcome as rows. The factors or categories in the same row indicate patterns of agreement across knowledge sources.

Patient and public involvement

The study is part of a participatory research programme involving stakeholders in Guerrero. The scoping review was part of a bigger process to bridge Indigenous and Western perspectives through intercultural dialogue.37 We contextualised the findings from the scoping review using stakeholder perspectives already gathered in independent exercises in which participants had full control and authorship of the maps. The present review compares patterns between different perspectives. In a subsequent step in the larger project, the literature review and stakeholder maps will provide the substrate for intercultural dialogue engaging traditional midwives, health service providers and researchers. That dialogue will clarify what traditional midwives and their communities require of the services to ensure their cultural safety, and how to implement it.

Results

Scoping review

Figure 1 provides an overview of the selection process for the scoping review. We examined 107 full texts and retained 87 documents, including 62 published papers, 15 book chapters, 7 dissertations and 3 reports between 1989 and 2020 (see online supplemental file 1). Some 61% (53/87) of documents were published in the last 10 years. The documents used English (60% or 52/87), Spanish (38% or 33/87) and Portuguese (2% or 2/87). Most studies were conducted in Mexico (38% or 33/87) and Guatemala (35% or 30/87), followed by Perú (7% or 6/87) and Ecuador (7% or 6/87). One multicounty study included contiguous communities in Mexico and Guatemala. Some 67% (58/87) were qualitative studies (mostly interviews, focus group discussions and observations), followed by 20% (17/87) quantitative and 14% (12/87) mixed methods. Cross-sectional surveys were the most common quantitative design. Three non-randomised studies used a pretest–posttest design to measure changes after training activities. Three pilot studies randomised an intervention to test the involvement of traditional midwives as facilitators of women groups,38 the use of mHealth technologies to encourage referrals,39 or support for traditional midwifery.40

Figure 1

Flow diagram of the selection of sources of evidence (Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews). (1) CINAHL, Scopus, LILACS, Medline, Embase, Google Scholar. (2) CEPAL, Repositorio FLACSO, BVS, BVS MTCI, PAHO, PAHO IRIS, Red de repositorios latinoamericanos, La referencia Dialnet, Redalyc, BDCOL, Biblioteca digital Bogotá, CLACSO, BRISA, WHO, WHO IRIS.

Following MMAT criteria,29 our main concern about the qualitative studies was the soundness of data collection methods and the level at which the interpretation of the results was substantiated by data. The quantitative randomised controlled trials were non-blinded due to the participation of communities in the interventions. Few quantitative studies clarified whether their samples were representative of the target population. The main limitation of mixed methods studies was quality, particularly of quantitative components, and integration of the different components in answer to the research question.

The studies addressed maternal health in different ways (online supplemental file 1), describing the practices of traditional midwifery or self-care customs, training programmes for traditional midwives, barriers and facilitators of access to Western healthcare versus traditional services, or tensions in the interface of Indigenous communities and healthcare services. Four references reported on programmes exclusively focused on supporting traditional midwifery.40–43

Few studies were explicit about how they approached cultural differences, and studies used different terminology and different interpretations of the same terminology. The terms included anthropologic or ethnographic, intercultural, integration of traditional midwives and strengthening of cultural traditions. The term intercultural, for example, was used to describe Western services adapted to cultural conditions of users,44 integration of traditional practices in Western settings,45 46 programmes offering training,46 programmes valuing and recognising cultural diversity,47 or hybrid scenarios for the practice of traditional birthing,48 among others.

Only one qualitative study focused specifically on traditional disease entities (‘isihuayo’ or ‘caída de matriz’ (fallen womb) and ‘necaxantle’ or ‘sobreparto’ (postpartum illness)),49 and eight studies mentioned traditional diseases.50–59 The aetiology, symptoms and treatment of these illnesses were rooted in the cosmovision of Indigenous groups and have been described as a result of imbalances of bodily and social equilibrium.49 Some of them included imbalances of corporal humours (cold and hot or humid and dry),53 others would include displacement of organs or parts of the body as described by Indigenous concepts of anatomy,49 negative effects of environmental conditions,56 58 postpartum complications of the mother,51 among others. Six studies (7%) reported specifically on health outcomes such as maternal mortality, childbirth complications, perineal trauma and postpartum infection. Almost all (80/87) focused on aspects of childbearing management and mothers’ experiences during the perinatal period. Most of these studies described traditional practices, explored barriers or facilitators for access to Western healthcare (for complications or routine), or described the quality of Western or traditional services (online supplemental file 1).

Studies in Canada,60 the USA,61 Chile55 and Western Mexico62 reported on memories of traditional birth practices no longer in use. In Perú and Chile, traditional midwives reported persecution by police due to their practice.55 59 During the selection of articles, it was evident that some Indigenous groups have transitioned to mestizo traditions, which made it difficult to establish if traditional midwives identified as Indigenous.63–65

Characteristics of participating traditional midwives varied widely between studies. One set of studies referred to older women and men linked with traditional culture, with almost no access to Western school, exclusively speakers of Indigenous language and who combine their work with other subsistence activities. This type of midwife was characterised by a vocation to serve their community, often responding to a divine call or inspiration, and recognition by their communities. They usually offered additional services as healers (curanderos) for children and other family members.46 49 57 59 66–68 The second set of studies referred to midwives similar to Western-trained birth attendants.25 69 This included younger Indigenous women, sometimes family of older traditional midwives, who were fluent in Spanish and received external training in the use of Western techniques. This type of midwifery was typically more welcome at the healthcare facilities and closer to Western worldviews.70 In some communities in Chile, Brazil and Mexico, the role of traditional midwives was less institutionalised because Indigenous women would give birth alone or with the support of their families, and traditional midwives would be those who know how to help in case of complications.55 62 71 The diversity of what could be considered traditional midwifery has generated several classifications,40 72 although few of the selected studies used these classifications. Some 17 of the 87 studies report no details about their participants, most of them simply reporting that their participants were traditional midwives from an Indigenous community.

Influences on maternal health in the scoping review

The 87 studies identified between 2 and 33 factors, and between 1 and 39 relationships between those factors. Together the studies identified 264 unique factors, which we grouped into 20 categories, linked by 1538 relationships after transitive closure. Table 1 shows a description of each category, and online supplemental file 2 shows the references for each of the maps that mentioned factors in these categories.

Table 1

Categories that emerged from the factors in the maps

Based on discourse analysis weighting, using relative frequency of relationships, figure 2 shows the 10 presumed most influential positive and negative relationships at the category level (online supplemental file 3). The categories with more and stronger outgoing relationships (higher outdegree centrality) were the practice of traditional midwifery, culturally unsafe care and material poverty and marginalisation of remote communities. The main outcomes explored in the literature, as indicated by a higher indegree centrality, were access to Western healthcare, followed by maternal health outcomes and practice of traditional midwifery. The three categories in the map with the strongest influences on maternal health outcomes included the positive effects of self-care practices and practice of traditional midwifery followed by the negative effects of disempowered communities, families or women.

Figure 2

Fuzzy cognitive map of the most influential categories identified in the scoping review. To simplify the graph, we only included the 10 strongest positive and negative relationships. Online supplemental file 3 contains all the relationships on the map. Solid lines represent positive relationships and dashed lines negative ones. The numbers on the edges represent the cumulative influence of one category on another, where 1 is the strongest influence on the map. The three boxes with ticker lines also had the highest outdegree centrality or influence in the whole system.

The traditional midwifery category had a self pointing arrow denoting reinforcing cycles defined by a commitment to their patients (community members), mentorship of apprentices and family heritage. The increasing age of traditional midwives had both positive and negative effects on their role: it impeded elderly traditional midwives from continuing their practice (negative) and brought more knowledge and esteem as they accumulated experience (positive). The spiritual dimension of traditional midwifery was reflected in mystic experiences signalling their professional call or providing spiritual/divine help during their practice. The influence of traditional midwifery was decreased by culturally unsafe care and by programmes focused on training and supplies.

The strongest outgoing arrows of traditional midwifery indicated the most frequently reported positive effects on maternal health through adequate management of childbirth (even of some complicated cases) and the control of traditional diseases. Two additional arrows indicated positive effects of traditional midwives on cultural continuity and promotion of self-care practices, which in turn had the strongest positive effect on maternal health. More traditional care in the communities increased the sense of confidence and agency of mothers and levels of family and community involvement (decreased disempowerment). Both cultural continuity and disempowerment reduced access to Western care. Cultural continuity reflected in Indigenous people preferring traditional care (midwives or other traditional practitioners) and avoiding Western health services. Disempowerment was reflected in mothers not deciding about their care or having their decisions overruled by husbands or mothers-in-law.

Culturally unsafe care also showed reinforcing dynamics through the accumulation of negative experiences, fear and lack of trust among Indigenous mothers and community members. Programmes that had a more sensitive approach to cultural differences contributed to a decrease in culturally unsafe attitudes, particularly among care providers, and thus allowed for increased use of Western care. Lack of community trust in Western health personnel was an important barrier to accessing institutional care, either because women did not go or because traditional midwives did not advise their patients to visit Western providers.

Material poverty and marginalisation often reduced access to Western healthcare due to the geographical distance, poor-quality infrastructure, or lack of resources or transport to reach the services.

Contextualisation of the scoping review with stakeholder perspectives

We compared the results of the scoping review with the final category maps from two previously reported studies that used FCM to describe stakeholder perspectives of factors affecting maternal health in Indigenous communities. A study in the south of Guerrero included 29 Indigenous traditional midwives from the Me'phaa (Tlapaneco) and Nancue ñomndaa (Amuzgo) groups.36 These women and two men had de facto recognition as midwives in their communities, based on their decades of service and traditional knowledge. Most used only Indigenous languages and the mapping session relied on trained intercultural brokers for translation. Traditional midwives drew their maps in group sessions, building one map of protective factors and another of risk factors.40 The second study of stakeholder perspectives summarised the views of eight intercultural researchers (three women and five men) with extensive experience in culturally safe health promotion (Mexico, Guatemala, Colombia, Canada, Nigeria, Botswana). All researchers had also contributed to the project that supported Indigenous traditional midwives (above), but none participated in the mapping sessions with the midwives. Researchers created individual maps with protective and risk factors on the same map.33 The maps from these two sources are available in online supplemental file 4.

Table 2 shows the pattern matching table to compare the three categories of factors with the strongest influence on maternal health in the maps from each of the three sources. A pattern identified across all the maps was the positive effect of self-care practices, rituals and traditional midwifery. In the stakeholder and literature maps, these categories had reinforcing relationships between them.

Table 2

Pattern matching table to compare the maps from three different sources about factors influencing positive maternal health

In another pattern across all the maps, traditional midwives stressed the importance of reducing violence against women and promoting a supportive role for male partners, in their words: ‘a loving, working and caring husband’. Researchers mentioned a broader category that included the reduction of violence and other aspects of women’s well-being. In the literature review, the concern about control of gender violence and women’s disempowerment was part of a broader category that included family and community empowerment. Traditional midwives mentioned their role in counselling partners to increase male engagement and reduce violence against mothers. The literature map (figure 2) indicated that traditional midwifery could reduce disempowerment of communities, families or women, while culturally unsafe care would increase disempowerment.

The concern about culturally unsafe healthcare and, in general, a culturally unsafe institutional environment for Indigenous communities was prominent among intercultural researchers. Traditional midwives expressed a similar concern when they described the influence of hospital in the community on maternal health (map 2 in online supplemental file 4). Although, in their view, it had a modest protective effect, the maps also showed the presence of hospital reducing other protective factors. The literature also highlighted the negative impact of culturally unsafe care (online supplemental file 3), but its effect was stronger in reducing access to Western healthcare than in reducing maternal health. In contrast with the literature’s main concern to increase access to Western health services, having a hospital in the community was not a priority for traditional midwives (map 2 online supplemental file 4), and researchers conditioned the importance of accessible health facilities to their level of cultural safety (map 3 online supplemental file 4).

Finally, in the maps from traditional midwives, the control of traditional diseases as positive for maternal health was prominent. The literature review also mentioned the importance of traditional diseases (table 1) but with a lower level of influence.

Discussion

The contextualisation of the scoping review with the perspectives of traditional midwives and intercultural researchers indicated that all three knowledge sources considered self-care practices, rituals and traditional midwifery as strong positive influences on maternal health in Indigenous communities. In the scoping review, access to Western healthcare was the primary outcome studied, followed by maternal health outcomes. For traditional midwives, a community-based hospital was less important and intercultural researchers conditioned its importance by its level of cultural safety. For traditional midwives, male support was the strongest protective factor; the researchers and the literature included male support in a category that comprised other aspects of women’s well-being and empowerment. Control of traditional diseases was important for midwives but less so in the literature.

The scoping review reveals an underdeveloped literature, with little quantitative evidence on traditional midwifery practices and their associated outcomes. Three small randomised trials involved traditional midwives, but only one tested the impact of their traditional practice. The studies had diverse approaches to cultural differences, ranging from assimilation of Indigenous cultures into Western ways to recognition of diversity and codesign of interventions. The studies used a range of definitions of traditional midwifery.

Most studies in the scoping review came from two countries (Guatemala and Mexico). They were published in English, a language not spoken widely in any of the countries reporting traditional midwifery. We expect research in a language not accessible to communities or traditional midwives will reflect a cultural bias that favours Western over Indigenous perspectives. The long history of colonisation underwrites a similar bias in research on Indigenous groups, who in turn have become increasingly vocal about decolonising methodologies.73 The bias understates community strengths and resources, diminished as these might be after centuries of colonisation, to focus on damage and deficit. Overcoming this emphasis on community weaknesses requires explicit theories from Indigenous perspectives.74 FCM provides a language to share and to examine these theories.

Several literature reviews have explored the impact of programmes involving traditional midwives (Indigenous and non-Indigenous) in maternal health.8 9 11–14 75 All explored strategies to assimilate Indigenous communities into the Western health system. We restricted our review to Indigenous communities and traditions, thus focusing on the scope of their work and their knowledge, resources and technologies.

Our study offers a soft model that surfaces different potential starting points for interventions to improve maternal health. Previous work in Africa has shown that involving local perspectives can help to develop culturally respectful interventions for the promotion of reproductive health.76 77 The literature map suggested that Western research has focused on understanding access to biomedical healthcare services as an outcome, as indicated by a higher indegree centrality in the map. Disrespect for Indigenous groups (cultural unsafety) and harsher material conditions accumulated to hinder Indigenous women’s access to Western services and affected other factors in the literature map. Lack of understanding of the needs and practices of Indigenous communities and not viewing cultural practices, including traditional midwifery, as a community strength, may limit the access of Indigenous communities to biomedical services (particularly if they require emergency obstetric care). A 2014 systematic global mapping78 and a 2016 systematic review79 explored interventions to address cultural factors that prevent access to Western maternity care. The reviews found that culturally congruent interventions can positively impact professional care, although few studies have measured impact in low-income and middle-income countries.

Contextualising this literature, both with local knowledge and international research expertise in culturally safe care, showed contrasting priorities in both promotion of Western healthcare and the role of traditional diseases. Although the literature recognises the existence of traditional concepts of diseases, more research is needed to understand them and their impact in terms of maternal health. The three sources coincided in suggesting that Indigenous communities could contribute knowledge, skills and resources to promote maternal health (e.g. self-care practices, rituals and traditional healers). The impact of traditional practices on maternal health outcomes remains a research priority. Communities with stronger traditions could be better positioned to protect the health of their mothers. Traditional healers in South America80 and Indigenous communities in Canada81 have suggested that cultural continuity has a positive effect on the health of Indigenous groups. Actions that promote ownership and sustained participation of Indigenous communities have shown positive changes in prenatal and child health outcomes in Canada.82 A further challenge will be to define and measure Indigenous cultural continuity and to establish its impact on healthy motherhood.

Particularly in Mexico, violence against Indigenous women is recognised as a risk factor for maternal and infant death with a structural dimension rooted in colonial history.83 84 There is a paucity of research on the potential contribution of traditional midwives in reducing violence against women. In Guerrero, Mexico and Africa, traditional midwives advise men and could engage them in providing support and an enabling environment for mothers.36 85 Research on this topic could include discussing ways to improve the male role drawing on cultural strengths.

Strengths and limitations

Our application of Harris’ discourse analysis permitted the incorporation of qualitative and quantitative data on causal relationships from the studies in the scoping review, without depending on empirical measurement, mathematical transformations or researcher assumptions. The weights of the relationships in the operator-independent maps are best interpreted as grades of consensus about influence, not as pooled estimates of impact.18 24 Harris’ discourse analysis is more informative in maps of categories of factors.33 These categories imply higher levels of abstraction with necessary losses in granularity for factor-level inference.86 The stakeholder maps that we compared with the scoping review came from two specific groups purposively selected, and future research with other stakeholder groups could offer additional perspectives.

Conclusions

The literature and stakeholder maps showed maternal health in Indigenous communities resulting from complex interacting factors. The FCM provided a practical way to compare and combine different sources of knowledge in a transparent and traceable way. The three knowledge sources agreed that traditional practices could have positive effects on the health of mothers, highlighting the need for additional research on this topic.

Data availability statement

All data relevant to the study are included in the article or uploaded as supplementary information. All relevant data are within the paper and supporting material.

Ethics statements

Patient consent for publication

Ethics approval

The overall research project has ethical approval from the Ethics Committee of the Centro de Investigación de Enfermedades Tropicales of the Universidad Autónoma de Guerrero, Mexico, (Reference 2013- 014) and the Faculty of Medicine and Health Sciences’ Institutional Review Board at McGill University (A06-B28-17B). Participant communities to which traditional midwives in Guerrero belong approved the study in 2015.

Acknowledgments

Martin Morris at McGill University's library conducted the search strategy and contributed to drafting the protocol. Lorena Niño at Evidence Knowledge Brokering in Public Health developed the additional search of grey literature. The members of Participatory Research at McGill kindly discussed early versions of this work. Michaela Field kindly copy edited the final version of the manuscript.

References

Supplementary materials

Footnotes

  • Twitter @Anna_Dion, @juanppimentel

  • Contributors IS designed the scoping review, drafted the manuscript and is the guarantor of the study. NA, SPS and AC supervised the design and conduction of the study and contributed to the manuscript. GZ contributed to resolving discrepancies in the definition of categories, the drafting of the manuscript and the discussion of results. IS, EV, PC, JP participated in the selection of the studies and data extraction. IS, AD and HS collaborated to develop and adjust mapping procedures. All authors read, contributed to and approved the final manuscript.

  • Funding The Graduate Research Excellence in Academics Award from the Department of Family Medicine at McGill University provided funding to support data extraction. The design, management, analysis, and reporting of the data are entirely independent of all sources of funding. CeiBa Foundation, the Center of Intercultural Medical Studies, and the Fonds de recherche du Québec Santé (255253) supported the work of Ivan Sarmiento.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.