Background: Atonic postpartum hemorrhage is ceased by creating negative pressure inside the uterine cavity which works by shrinking of uterus. It is similar to the natural physiological process of contraction and retraction to stop atonic postpartum haemorrhage. Methods: Forty three women with different risk factors for atonic PPH like obstructed prolonged labour, accidental haemorrhage, PIH, anaemia complicating pregnancy, multifetal pregnancy, and polyhydramnios, either alone or in combination, and who delivered either normally or by caesarean section were included in this study. Age, parity, gestational age at delivery was recorded.In vaginal delivery, if the bleeding did not stop by medical measures, womenwas put in lithotomy position, vaginal exploration was done to exclude genital tract trauma. A specially made stainless steel (PANICKERS PPH CANNULA) of 12 mm in diameter and 25 cm in length with multiple holes of 4 mm diameter at the distal 12 cm of the cannula was introduced into the uterine cavity through the vagina to reach the fundus. The cannula was connected to a suction apparatus, and a negative pressure of 650 mm mercury produced. The quantity of blood sucked varies from 50–300 ml. The suction was maintained for 30 min. Then the cannula was taken out slowly after releasing the suction. Usually there is was no further bleeding from the uterine cavity, and the uterus gets well contracted and retracted. In case of atonic PPH noted during cesarean section cannula was inserted into uterine cavity through incision site, suction tubings brought out through vagina via cervical os and the negative pressure was created. The blood collected in suction bottle was measured and recorded. Results: Complete cessation of bleeding which was associated with contraction and firm retraction of uterus was observed in most women within 4minutes after initiation of procedure. The amount of blood collected in suction bottle ranged from 50ml to 300ml. Conclusion: Creating negative pressure inside uterine cavity is a very effective physical method which mimics the natural physiological process of contraction and retraction to stop atonic postpartum hemorrhage. It is easy, cost effective, fertility saving and life-saving technique. It can be made available in any setting, and can become the first defense against atonic PPH.