Absolute contraindications
Pregnancy
Acute or subacute pelvic inflammatory disease or purulent cervicitis
Relative contraindications
History of pelvic inflammatory disease since the last pregnancy
Lack of available follow-up care
Menorrhagia or severe dysmenorrhea (copper IUD)
Cervical or uterine neoplasia
Abnormal size or shape of uterus, including myomas distorting cavity
* IUD = intrauterine device.