Introduction: Stress is common among postnatal mothers due to different reasons. Postpartum stress is hailed as a driving force bring out by postpartum stressors (Hung 2001). Stress during childbearing period can have serious negative outcomes on the woman, and the new-born. It may lead to physiological -psychological effects also. This study objective was to assess the perceived stress in postnatal mothers and to ndMethods: the association between perceived stress and selected socio demographic variable among postnatal mothers who are admitted in gynaecological wards in a tertiary care hospital, South India by quantitative approach with descriptive design among 60 mothers. The Perceived stress scale was administered to the participants. indicated that, 8.3% comes under the category of 'Low perceived stress', 83.3% comes under 'ModerateResults perceived stress', and only 8.3% comes under the 'High perceived stress'. Analysing the frequency distribution and the percentage, the contributing factors and its association with the selected demographic variables were found out performing the chi-square value (p value), the association of the selected demographic variables with the level of stress was done and it showed a statistical signicance with the 'Job of Husband' and 'Immunization status of the new born' in this study. Early identication and proper counselling of the mothers and their familyConclusion: regarding the identication of factors responsible for stress and keeping the new born immunized can be helpful to reduce the stress and anxiety.