|Growth hormone (GH) is a peptide hormone responsible for promoting growth, cell reproduction and regeneration. Somatotropin or somatropin is another name of growth hormone. It raises the concentration of glucose and free fatty acids in response to stress. It also helps promote muscle and bone mass.The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number ofÂ citationsÂ to recent articles published inÂ science and social science journals in a particular year or period, and is frequently used as aÂ proxyÂ for the relative importance of a journal within its field. It is first devised byÂ Eugene Garfield, the founder of theÂ Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.