According to the rules of Medical Council of India and the National Board of Examinations, a student before being permitted to appear in the examination for the degree of MD/DNB in emergency medicine, is required to submit a dissertation as a proof of having undertaken a research of high order under the guidance of a recognized postgraduaute teacher during the period of training at the institute. The board of examiners appointed by the institute evaluate the research work which is submitted as thesis or dissertation. Thesis writing has evolved from simple reseach to a more comprehensive scientific writing with major emphasis on clinical and statistical content. We attempt to present the intricacies in writing scientific literature and expect that this information is useful to the postgraduate students. This review does not talk about how to conduct a study. However, we have hinted on them at few places to clear the common doubts.\