Characteristic |
Copper-Bearing IUD |
Levonorgestrel IUD |
Effectiveness |
Nearly equal. Both are among the most effective methods. |
Length of use |
Approved for 10 years. |
Approved for 5 years. |
Bleeding patterns |
Longer and heavier monthly bleeding, irregular bleeding, and more cramping or pain during monthly bleeding. |
More irregular bleeding and spotting in the first few months. After one year no monthly bleeding is more common. Causes less bleeding than copper-bearing IUDs over time. |
Anemia |
May contribute to iron-deficiency anemia if a woman already has low iron blood stores before insertion. |
May help prevent iron-deficiency anemia. |
Main reasons for discontinuation |
Increased bleeding and pain. |
No monthly bleeding and hormonal side effects. |
Noncontraceptive benefits |
May help protect against endometrial cancer. |
Effective treatment for long and heavy monthly bleeding (alternative to hysterectomy). May also help treat painful monthly bleeding. Can be used as the progestin in hormone replacement therapy. |
Postpartum use |
Can be inserted up to 48 hours postpartum. |
Can be inserted after 4 weeks postpartum. |
Use as emergency contraception |
Can be used within 5 days after unprotected sex. |
Not recommended. |
Insertion |
Requires specific training but easier to insert than levonorgestrel IUD. |
Requires specific training and a unique, more difficult insertion technique. Women may experience faintness, pain, and nausea or vomiting at insertion more than with the copper-bearing IUD. |
Cost |
Less expensive. |
More expensive. |