https://www.kentandmedwayformulary.nhs.uk/therapeutic-sections/genito-urinary-system/contraception/contraceptive-devices-copper/
Contraceptive devices - copper
Drug Safety Update June 2015: Intrauterine contraception: uterine perforation—updated information on risk factors NICE Guidance CG30: Long-acting reversible...
contraceptive devicescopper
https://bjgp.org/content/26/163/147
Pregnancy in women using intra-uterine contraceptive devices | British Journal of General Practice
Among 1,041 women fitted with intra-uterine contraceptive devices during a period of 21,445 months there were 51 pregnancies: a rate of 2·9 per hundred women...
in womencontraceptive devicesbritish journalgeneral practicepregnancy