As defined by the World Association of Medical Editors (http://wame.org):
Plagiarism is the use of others' published and unpublished ideas or words (or other intellectual property) without attribution or permission, and presenting them as new and original rather than derived from an existing source. The intent and effect of plagiarism is to mislead the reader as to the contributions of the plagiarizer. This applies whether the ideas or words are taken from abstracts, research grant applications, Institutional Review Board applications, or unpublished or published manuscripts in any publication format (print or electronic).
Plagiarism is scientific misconduct and should be addressed as such.
Self-plagiarism refers to the practice of an author using portions of their previous writings on the same topic in another of their publications, without specifically citing it formally in quotes.
Manuscripts containing plagiarism and self-plagiarism are not considered for publication in the journal "Reproductive Endocrinology".
All manuscripts submitted for consideration to the journal “Reproductive Endocrinology” are checked for uniqueness by specialized service UNICHECK. A manuscript can be accepted for consideration only if it is unique at least 80% considering references.