T-shaped plastic device with copper coil (380 mm² surface). Copper ions are toxic to sperm and ova, induce local endometrial inflammation that prevents implantation. Contains no hormones – does not affect ovulation or milk supply. Lifespan 5-10 years depending on model. Pearl Index 0.6 perfect-use.
Indications
A
Contraception
First line
Long-acting non-hormonal contraception for 5-10 years. Per SEGO 2023, first-line for women with hormonal contraindications, breastfeeding, or hormone intolerance. Also available as emergency contraception within 120 h post-coitus (>99% efficacy).
Contraception during breastfeeding. MEC 2015 category 1 from day 1 postpartum (category 2 in first 4 weeks – perforation risk). No effect on lactation – no systemic copper, no hormones. Ideal choice when avoiding hormones.
Emergency contraception within 120 h post-coitus. Per SEGO 2023 and FSRH 2017, the most effective method (>99% efficacy), especially with BMI ≥30, late presentation, and concurrent need for long-acting method. Office insertion.
Insertion by a gynecologist on any day of the cycle with a negative pregnancy test. Postpartum, ideally at 4-6 weeks. Fertility returns immediately after removal.
Monitoring
Menses become 30-50% heavier and 1-2 days longer in first 3-6 months. With severe anemia or intolerance, discuss switching to LNG-IUS (Mirena).
Check interaction with another drug
Opens the checker prefilled with this drug. Pick the second one from your regimen.
Hormone-free, copper not systemically absorbed. WHO MEC 2015 category 1 from day 1 postpartum. No effect on milk volume or composition. Ideal choice for breastfeeding women avoiding hormones.
Reference information, not a clinical decision. Discuss feeding pauses or changes with your physician or an IBCLC.
Frequently asked
What is Copper intrauterine device used for?
Copper intrauterine device is evaluated for the following indications with varying evidence strength: Contraception (evidence tier A), Contraception during breastfeeding (evidence tier A), Emergency contraception (evidence tier A). See the full indication matrix with dosing and citations above on this page.
What are the side effects of Copper intrauterine device?
Common side effects of Copper intrauterine device (≥ 1 in 100): Heavier and longer menses, Menstrual cramps (first 3-6 months), Pelvic pain on insertion. See the Safety section for uncommon and serious reactions.
Is Copper intrauterine device safe during pregnancy?
FDA category X. Remove as soon as possible if pregnancy occurs.
Is Copper intrauterine device compatible with breastfeeding?
Hormone-free, copper not systemically absorbed. WHO MEC 2015 category 1 from day 1 postpartum. No effect on milk volume or composition. Ideal choice for breastfeeding women avoiding hormones.
Who should not take Copper intrauterine device?
Copper intrauterine device is contraindicated in: Pregnancy; Acute PID; Uterine cavity anomalies; Cervical or endometrial cancer; Unexplained uterine bleeding. Full list in the Safety section.