|RSA, definite as 2 or additional repeated pregnancy losses, disturbs about 2-3% of women attaining pregnancy. The experience takes a heavy emotional, physical and financial toll on patients and their families. Presently accepted testing for uterine anatomic abnormalities, Antiphospholipid antibodies (APA) and karyotypic abnormalities of the parents leave about 50% of RSA unexplained. The absence of pure causality and treatment to prevent recurrence episodes adds to the load of this diagnosis.
Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results.
Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications.
The concept of "review article" is separate from the concept of peer-reviewed literature. It is possible for a review to be peer-reviewed, and it is possible for a review to be non-peer-reviewed.