Ethical conduct of research is essential to safeguard research participants. All over the world, research is carried out only in accordance with the country’s National ethical guidelines. The author is referred to the 2017 Indian Council of Medical Research (ICMR) National Ethical Guidelines for Biomedical Research Involving Children [1]; wherein it is clearly stated that waiver of consent may be obtained in retrospective studies, where the participants are de-identified or cannot be contacted. Hence there will not be an issue in conducting retrospective studies.