Science expects one to think in a rational and logical manner and studying science renders the ability to question happenings around us. But girls on the other hand are exposed to varied forms of menstrual myths and beliefs which are based on mythological stories and are in complete contradiction to scientific reasoning. Thus it becomes important to see whether they look at these menstrual myths related practices through a scientific lens or not. The paper explores the ability to look at menstrual beliefs through scientific lens among girls of Grade X in schools in New Delhi. The findings point out that girls of these schools have many misconceptions based on menstrual myths surrounded in their life and studying science has not been able to inculcate scientific reasoning among them.