Barkoff J R
Int J Dermatol. 1976 Oct;15(8):594-5. doi: 10.1111/j.1365-4362.1976.tb04896.x.
A 24-year-old woman developed in acute urticarial reaction secondary to a copper intrauterine contraceptive device. Allergy to copper was proven by scratch tests. The condition cleared with removal of the IUD.