Maya Ellison
Intrauterine devices (IUDs) are small, T-shaped contraceptive devices that are implanted inside the uterus. They are made of plastic or metal and come in a variety of shapes. IUDs are a form of long-acting reversible contraception (LARC) and can be made of copper or plastic. Copper IUDs are wrapped in copper wire and do not contain any hormones, while hormonal IUDs release small amounts of the hormone progestin or levonorgestrel. Both types of IUDs have plastic frames that open into a T-shape once inside the uterus.
| Characteristics | Values |
|---|---|
| Material | Plastic or metal |
| Shape | T-shaped |
| Types | Copper, hormonal (levonorgestrel) |
| Brands | Paragard, Mirena, Liletta, Kyleena, Skyla |
| Effectiveness | 99.2% (copper), 99.8% (hormonal) |
| Side effects | Heavier bleeding, severe menstrual pain, cramps (copper); easing menstrual pain and heavy bleeding (hormonal) |
| Duration | 3-12 years, depending on the brand and type |
| Cost | $1,200 (copper), $1,500 (hormonal) |
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What You'll Learn
IUDs can be made of plastic or metal
Intrauterine devices (IUDs) are small, T-shaped contraceptive devices that are inserted into the uterus. They are a form of long-acting reversible contraception (LARC) and can be made of plastic or metal.
The use of IUDs as a form of birth control dates back to the 1800s, but their widespread use began in the late 1950s with the development of flexible plastic IUDs by Jack Lippes and others. Lippes' "Lippes Loop" was a simple plastic device made of thermoplastics, which could bend for insertion and return to its original shape. Lazar C. Margulies also developed a plastic IUD using thermoplastics in the 1960s, which did not require dilation of the cervix for insertion. These plastic IUDs laid the foundation for future developments and contributed to the popularity of IUDs as a contraceptive option.
Today, IUDs are typically made of either plastic or copper, with some containing hormones. Copper IUDs, such as Paragard, are wrapped in copper wire or have copper collars, while hormonal IUDs, like Mirena, Kyleena, Liletta, and Skyla, release the hormone progestin or levonorgestrel. Copper acts as a spermicide by increasing copper ions, prostaglandins, and white blood cells, creating an environment toxic to sperm. Hormonal IUDs, on the other hand, work by thickening cervical mucus, trapping sperm and sometimes inhibiting ovulation.
Both types of IUDs have plastic frames that open into a T-shape once inside the uterus. These frames have strings attached to facilitate detection and removal by a healthcare provider. While the primary mechanism of action for IUDs is preventing sperm from reaching the egg, they may also prevent implantation of a fertilized egg.
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Copper IUDs
The Paragard IUD is the only copper IUD brand available in the United States. It is hormone-free and can be used as emergency contraception if inserted within 120 hours after unprotected sex, with a 99% effectiveness rate. Copper IUDs can cause side effects such as increased menstrual bleeding and painful cramps, especially during the first few months of use. However, these side effects often improve as the body adjusts to the IUD.
It is important to note that copper IUDs should not be used by individuals with a copper allergy or Wilson disease, a genetic condition that causes copper buildup in the body. While copper IUDs are highly effective, they do not protect against sexually transmitted infections (STIs), so using additional protection like condoms is recommended.
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Hormonal IUDs
An intrauterine device (IUD), also known as an intrauterine contraceptive device (IUCD or ICD) or coil, is a small, T-shaped birth control device that is inserted into the uterus to prevent pregnancy. The first IUDs were made of thermoplastics, which can bend for insertion and retain their original shape. Over time, many different shaped plastic IUDs were invented and marketed.
There are four types of hormonal IUDs available in the United States: Mirena, Kyleena, Liletta, and Skyla. They all contain the same hormone (levonorgestrel) but differ in how long they can be worn. Mirena and Liletta last for up to eight years, Kyleena lasts for up to five years, and Skyla lasts for up to three years.
It is important to note that IUDs do not protect against sexually transmitted infections (STIs), so it is recommended to use condoms with an IUD to lower the risk of STIs.
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IUDs are a form of birth control
An intrauterine device (IUD), also known as an intrauterine contraceptive device (IUCD or ICD) or coil, is a small, often T-shaped birth control device that is inserted into the uterus to prevent pregnancy. IUDs are a form of long-acting reversible contraception (LARC). The use of IUDs as a form of birth control dates back to the 1800s.
IUDs are made of plastic or metal. The first-generation IUDs were made of thermoplastics, which can bend for insertion and retain their original shape. Over the years, many different shaped plastic IUDs were invented and marketed. Today, both copper and hormonal IUDs form a T-shape inside the uterus, which holds the device in place. The T-shape is made possible by plastic frames that open inside the uterus.
There are two kinds of IUDs: copper IUDs and hormonal IUDs. Copper IUDs do not contain any hormones but release copper ions, which are toxic to sperm. They also cause the uterus and fallopian tubes to produce a fluid that contains white blood cells, copper ions, enzymes, and prostaglandins, which is also toxic to sperm. The copper-bearing IUD acts as a spermicide, killing or impairing sperm so they cannot reach the egg. Copper IUDs have a first-year failure rate ranging from 0.1 to 2.2%.
Hormonal IUDs, on the other hand, release small amounts of the progestin hormone levonorgestrel over time. Levonorgestrel thickens the cervical mucus, making it harder for sperm to swim to the fallopian tubes. It also thins the uterus lining and partially suppresses the release of an egg during the menstrual cycle. Not all hormonal IUDs contain the same amount of levonorgestrel or have the same release rate. For example, Mirena and Liletta release more progestin than Kyleena and Skyla.
IUDs are highly effective at preventing pregnancy and can last for up to 10 years or more, depending on the specific type. They are the second most popular form of reversible birth control after birth control pills. Globally, around 23% of women who use contraception choose IUDs.
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IUDs are inserted into the uterus
An intrauterine device (IUD) is a small, T-shaped birth control device that is inserted into the uterus to prevent pregnancy. IUDs are a form of long-acting reversible contraception (LARC). They are typically made of plastic or metal and come in a variety of shapes. IUDs have been used as a form of birth control since the 1800s, but their popularity has fluctuated due to safety concerns and advancements in design. Today, IUDs are considered a safe and effective method of contraception, with a low failure rate of less than 1%.
The process of inserting an IUD into the uterus is typically performed by a healthcare provider, such as a gynecologist or a specialised doctor. The IUD is inserted through the cervix and positioned near the top of the uterus, where its T-shaped frame helps to hold it in place. The insertion procedure is generally quick and safe, but it is normal to experience some discomfort or cramping during and after the process.
There are two main types of IUDs: copper IUDs and hormonal IUDs. Copper IUDs, such as Paragard, are made of plastic and copper wire or collars. They work by acting as a spermicide, killing or impairing sperm before they can reach and fertilise an egg. Copper IUDs can also alter the uterine environment, making it difficult for a fertilised egg to implant. They are highly effective, with a first-year failure rate of 0.1% to 2.2%.
Hormonal IUDs, such as Mirena, Kyleena, Liletta, and Skyla, release small amounts of the progestin hormone levonorgestrel. This hormone thickens the cervical mucus, creating a barrier that traps and blocks sperm. Additionally, hormonal IUDs can suppress ovulation, preventing the release of an egg during the menstrual cycle. Hormonal IUDs are also highly effective, with a success rate of 99.8%.
IUDs are a popular choice for contraception due to their long-lasting effectiveness and convenience. Once inserted, an IUD can prevent pregnancy for up to 10 years or more, depending on the brand and type. They are also reversible, meaning individuals can choose to have the IUD removed at any time if they decide to become pregnant or no longer want the device. The removal process is typically quick and easy, and individuals can get pregnant soon after the removal.
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Frequently asked questions
An intrauterine device (IUD), also known as an intrauterine contraceptive device (IUCD or ICD) or coil, is a small, often T-shaped birth control device that is inserted into the uterus to prevent pregnancy.
IUDs are plastic or metal objects in a variety of shapes that are implanted inside the uterus. Copper IUDs are made of copper and plastic.
Researchers suspect that they cause a mild inflammation of the endometrium, thus inhibiting ovulation, preventing fertilization, or preventing implantation.
There are two types of IUDs: copper and hormonal. Copper IUDs are made of copper and plastic and do not contain any hormones. Hormonal IUDs release small amounts of the progestin hormone levonorgestrel over time.
IUDs can prevent pregnancy for up to 10 years or more, depending on the specific type.
