For a woman with bleeding and threatened abortion, ultrasound scan is done to confirm the viability of the fetus; however, 10-15% of the embryos are eventually aborted. Distinguishing between women with good and poor prognosis can be a helpful approach. This study aimed to review the predictive value of Pregnancy-associated Plasma Protein A (PAPP-A) in relation to the diagnosis of fetal loss. The articles published in multiple databases including Web of Science, PubMed, MEDLINE, Scopus, and Persian databases such as ISC, Magiran, and IranMedx were searched for articles published until May 2019. MeSH terms was used for searching the databases including fetal loss OR pregnancy loss OR abortion OR miscarriage with the following word using AND; Pregnancy-Associated Plasma Protein-A OR PAPP-A. Two reviewers extracted data and recorded them in a pre-defined form and assessed the quality of articles using the Newcastle-Ottawa tool. Meta-analysis was done using the Comprehensive Meta-Analysis/2.0 software and MetaDisc. A total number of 16 studies were eligible for the qualitative data synthesis, out of which 8 studies were included in the meta-analysis. selleck chemicals All studies had high and medium quality. The forest plot analysis showed a sensitivity of 57% (95% CI 53-63%), a specificity of 83% (95% CI 80-85%), a positive likelihood ratio of 3.52 (95% CI 2.44-5.07), a negative likelihood ratio of 0.54 (95% CI 0.37-0.79), and a diagnostic odds ratio of 6.95 (95% CI 3.58-13.50). PAPP-A cannot be recommended on a routine basis for predicting fetal loss and still further research with a combination of other biomarkers is required.PAPP-A cannot be recommended on a routine basis for predicting fetal loss and still further research with a combination of other biomarkers is required. Low back pain is a considerable global public health problem. Use of back belts in occupational settings arises from the expectation of countless biomechanical benefits, which together would contribute to the prevention of this problem. To orient students, physicians and health institutions on the use of back belts, lumbar support or braces for prevention of low back pain or injury among asymptomatic workers. The present guideline was developed based on a systematic literature review; 809 studies were located in database MEDLINE and 571 in EMBASE and Cochrane CENTRAL. Evaluating back-belt use as preventive intervention against low back pain demands quantifying benefits, harms and difficulties to implementation, as well as the methodological quality of primary studies. Despite the weak benefits reflected in the individual, partial and isolated results of a few studies, there is no consistent evidence for the use of back belts, lumbar supports or braces for primary prevention of low back pain or occupational low back injury among workers. According to the available evidence, back-belt use is not associated with reduction of absenteeism.Despite the weak benefits reflected in the individual, partial and isolated results of a few studies, there is no consistent evidence for the use of back belts, lumbar supports or braces for primary prevention of low back pain or occupational low back injury among workers. According to the available evidence, back-belt use is not associated with reduction of absenteeism. Effects of yoga on physical and mental health have been investigated in several fields. To investigate and analyze results of yoga interventions in the workplace reported along 10 years after the formulation of the National Policy of Integrative and Complementary Practices. We located 10 studies published from 2006 to 2015 which met the inclusion criteria, included in databases Cumulative Index of Nursing and Allied Health Literature (CINAHL), Medical Literature Analyses and Retrieval System Online (MEDLINE), Web of Science, Scopus, Cochrane and Scientific Electronic Library Online (SciELO). Analyzed variables were publication year, authorship, title, aims, results, and conclusions. Interventions were characterized based on yoga style, practices implemented, frequency and duration of sessions, duration of intervention, measurement instruments, and additional interventions. Our findings suggest that yoga has physical and psychological effects on workers from different professional categories. However, we did not find benefits for some conditions, and yoga practice does not have the same positive effects on all practitioners. Workers' adherence to programs influences the results of research. Many studies did not clearly describe the implemented programs. The characteristics of interventions show substantial differences among programs, which enable a synthesis, but not comparisons.The characteristics of interventions show substantial differences among programs, which enable a synthesis, but not comparisons. Rural Brazil is known for its history of poor working and living conditions; in some regions the population becomes vulnerable to health and work problems. To investigate the association between health vulnerability and environmental factors among rural workers. Descriptive study which consisted in a narrative review of literature published from 2012 to 2017. The literature search was conducted in databases Scientific Electronic Library Online (SciELO) and Latin American and Caribbean Health Sciences Literature (LILACS) using Health Sciences Descriptors (DeCS) "health," "vulnerability," "rural population" and "rural worker health." Six studies were retrieved which mainly associated health vulnerability to inadequate or no use of specifically required personal protective equipment, in addition to pointing out actions essential for health promotion, such as adequate diet and leisure time, physical activity, dignified working conditions, and social contacts. Rural work environmental factors are directly related with health vulnerability. Prevention of exposure to risk of disease and health promotion actions are essential to minimize health problems, especially the ones associated with exposure to agrochemicals.Rural work environmental factors are directly related with health vulnerability. Prevention of exposure to risk of disease and health promotion actions are essential to minimize health problems, especially the ones associated with exposure to agrochemicals.