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The Curious Bag
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An IUD, or intrauterine device, is a small device that is placed into the uterus to prevent pregnancy. This long-term birth control method boasts an effectiveness rate of more than 99% and offers freedom from having to take a daily pill.
Types of IUDs
There are two types of IUDs: Mirena and ParaGard. Mirena must be replaced every five years, while ParaGard must be replaced every 12 years.
How IUDs Work
IUDs prevent sperm from being able to join with the egg. Both types of IUDs work by thickening cervical mucus, blocking sperm from passing through to fertilize the egg.
How Mirena Works
Mirena works by delivering a low dose of hormones directly to the uterus. The progestin in Mirena prevents ovulation. It should be inserted within one week of the beginning of a period.
How ParaGard Works
ParaGard is hormone-free, but it contains copper. The copper in ParaGard prevents sperm from reaching the egg and prevents the egg from implanting in the uterus.
It Only Works If It Is Correctly Placed
You must check the string attached to your IUD each month. The device will not be effective if it has slipped out of place or perforated your uterus. These are both serious situations that require treatment and back-up birth control methods, such as condoms.
Source:
Resource:
American Academy of Family Physicians: IUD
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