Levonorgestrel intrauterine device can be left in place for five years.
Harrison-Woolrych
M
M
Raine
J M
JM
D003271:Contraceptive Agents, Female / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D007436:Intrauterine Devices, Medicated; D016912:Levonorgestrel / Q000008:administration & dosage*; D013997:Time Factors
D003271:Contraceptive Agents, Female; D016912:Levonorgestrel