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How does an iud work
How an IUD (Intrauterine Device) Works
An intrauterine device (IUD) is a small, T-shaped device that’s placed inside the uterus to prevent pregnancy. These devices, available in two types—hormonal and copper IUDs—are safe and also over 99% effective, offering a reliable and long-lasting birth control solution.
How IUDs Work to Prevent Pregnancy
Hormonal IUDs
HormonalIUDs work by releasing small amounts of progestin and thickening the cervical mucus, which traps and blocks sperm so they cannot reach and fertilize an egg.
It also thins the uterine lining, making it difficult for a fertilized egg to implant.
Hormonal IUDs begin working within seven days of insertion and can stay in the uterus and effectively prevent pregnancy for between three and eight years.
Copper IUDs
Nonhormonal copper IUDs create an environment that is hostile to sperm, making it harder for them to move and survive, preventing the sperm from reaching and fertilizing an egg.
The copper IUD starts working immediately after insertion and is effective in preventing pregnancy for up to
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