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Purpose: Most industrialized countries have introduced maternity protection legislation (MPL) to protect the health of pregnant workers and their unborn children from workplace exposure. This review aimed to assess this legislation's level of implementation, barriers and facilitators to it, and its expected or unexpected effects., Methods: A realist narrative review was conducted. Keyword searches of the PubMed, CINAHL, PsycINFO, MIDIRS, Sociological abstracts and Google Scholar electronic databases were performed in March 2018., Results: The 42 publications included show that the implementation of MPL is deficient in most countries. Allowing pregnant women to withdraw from work on preventive leave or sick leave is favored over workplace adaptations or worker reassignments. The publications highlight mechanisms which encourage or obstruct the enforcement of legislation at the levels of the individual, the physical and social environment, and the macrosocial context. The delay between the conception and implementation of maternity protection measures appears to be a major barrier to the efficacy of MPL. The literature also suggests that unexpected adverse effects, such as degradation in working relationships or discrimination can obstruct the implementation of protective measures., Conclusions: This study showed the need for a better implementation of MPL during pregnancy. Further research and recommendations for improvements in MPL should consider the diverse mechanisms and effects of its implementation. Barriers and adverse effects of this implementation do not only ensure a lack of information or awareness about MPL, but are also linked to contradictions between requirements to protect employment and protect pregnancy.

Purpose: The aim of this study was to understand the differential acute effects of two distinct wheat-related dusts, such as field or stored wheat dust handling, on workers' health and how those effects evolved at 6 month intervals., Methods: Exposure, work-related symptoms, changes in lung function, and blood samples of 81 workers handling wheat and 61 controls were collected during the high exposure season and 6 months after. Specific IgG, IgE, and precipitins against 12 fungi isolated from wheat dust were titrated by enzyme-linked immunosorbent assay, dissociation-enhanced lanthanide fluorescence immunoassay, and electrosyneresis. The level of fungi was determined in the workers' environment. Levels of exhaled fraction of nitrogen monoxide (F E NO) and total IgE were obtained. Exposure response associations were investigated by mixed logistic and linear regression models., Results: The recent exposure to field wheat dust was associated with a higher prevalence for five of six self-reported airway symptoms and with a lower F E NO than those in the control population. Exposure to stored wheat dust was only associated with cough. No acute impact of exposure on respiratory function was observed. Exposure to field wheat dust led to workers' sensitization against the three field fungi Aureobasidum, Cryptococcus, and Phoma, although exposure to storage wheat dust was associated with tolerance. The level of Ig remained stable 6 months after exposure., Conclusion: The clinical picture of workers exposed to field or storage wheat dust differed. The systematic characterization of the aerosol microbial profile may help to understand the reasons for those differences.