Intrauterine devices

A. The currently available intrauterine devices (lUDs) are safe and effective methods of contraception:

1. Copper T380 IUD induces a foreign body reaction in the endometrium. It is effective for 8 to 10 years.

2. Progesterone-releasing IUDs inhibit sperm survival and implantation. They also decrease menstrual blood loss and relieve dysmenorrhea. Paragard is replaced every 10 years. Progestasert IUDs must be replaced after one year.

3. Levonorgestrel IUD (Mirena) provides effective contraception for five years.

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