The woman, who is in her 40s, and her 35-year-old boyfriend were arguing Sunday night before the stabbing, The Local reported.
The suspect then "stabbed his partner in the breasts so that the silicone has leaked out," Nils-Erik Svensson of the local police told the Helsingborgs Dagbladet newspaper.
The woman was taken to a Helsingborg hospital with "not life-threatening" injuries, the newspaper said.
Police arrested the man, who has a violent criminal record, police said, and charged him with aggravated assault.
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