Uninterrupted Breast crawl technique is important just after the delivery, may promote breastfeeding and prevent postpartum hemorrhage. Objectives: To evaluate the effectiveness of breast crawl technique on physiological outcome during the third stage of labour and immediate initiation of breastfeeding among postnatal mother in the experimental group. Design: Quasi-experimental posttest-only design. Setting: Selected hospital, Trichy.Participants:60 postnatal mothers fulfilling the inclusion criteria. Selection criteria: Postnatal mothers, experimental group 30, control group 30 on the third stage of labour at a Selected hospital were included. Methods: Non-probability convenience sampling technique was used. Results: The result shows that among postnatal mothers in an experimental group, the level of blood loss 17 (57%) of postnatal mothers had mild blood loss, 13 (43%) had moderate blood loss and none of them had severe blood loss. Regarding duration of separation of the placenta in the third stage of labour 19 (63%) has ≤ 6 min and 11 (37%) has > 6 min. Majority 2 (7%) had maximum breastfeeding score, 28 (93%) had effective vigorous feeding and none of them had moderately effective feeders and effective sucking rhythm not established. Unpaired’ test shown, blood loss (4.76), duration of separation of the placenta in the third stage of labour (7.84) and immediate initiation of breastfeeding (10.92) statistically significant at p0.05. Conclusion: The breast crawl technique was effective on physiological outcome during the third stage of labour and immediate initiation of breastfeeding in the experimental group. Clinical applications: The breast crawl technique is one of the physiological techniques which can be applied to improve the physiological outcome of the mother in the third stage of labour & improve the breastfeeding.