Medical doctor disclose this in a publication by AFP, that the woman was shot while walking down the street in Toronto.
According to AFP "The 30-year-old's left breast implant deflected the bullet away from her vital organs into the other breast, according to a case study published last week in the SAGE medical journal.
The incident, which occurred in 2018, is one of only a handful of cases where a woman was saved by her breast implants and is believed to be the first involving silicone ones, the study said.
The patient, who was not named, went to the local emergency department in the Canadian city after feeling pain in her chest and seeing blood.
Surgeons found a single entry wound and retrieved a bullet from below her right breast, which police forensics later determined was a copper jacketed 0.40 caliber, the study said.
They removed her implants and photographs with the study and CT scans show the bullet passed through her left implant and hit her right one.
"Based on trajectory of bullet entry clinically and evaluation radiologically, the only source of bullet deflection of the bullet is the left breast implant," it said.
"This implant overlies the heart and intrathoracic cavity and therefore likely saved the woman's life."
Surgeon Giancarlo McEvenue, who wrote the case study, told CNN the bullet entered the woman's left side and ricocheted across her sternum into the right breast.
"The implant caused the change in the trajectory of the bullet," he said.
"On the left hand side is the heart and lungs -- if the bullet would have gone into the chest, she would have had a much more serious, possibly life-threatening injury."
Despite being shot in the chest at close range, the woman escaped relatively unscathed with a fractured rib and damaged implants.
The shooting was under investigation, the study said.
"The firearm was never recovered, and the shooter remains unknown."