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Hormonal intrauterine contraceptives are known as intrauterine systems (IUS) or Intrauterine Devices (IUD). An IUS/IUD must be inserted by a health professional. The copper IUD does not contain hormones. While a copper-containing IUD may be used as emergency contraception, the IUS has not been studied for this purpose.
The hormonal IUD is a small T-shaped piece of plastic, which contains levonorgestrel, a type of progestin. [29] The cylinder of the device is coated with a membrane that regulates the release of the drug. [75] Bayer markets Skyla as Jaydess in the United Kingdom. [76] Jaydess releases six micrograms per day and lasts for three years. [77]
IUDs primarily work by preventing fertilization. [21] The progestogen released from hormonal IUDs mainly works by thickening the cervical mucus, preventing sperm from reaching the fallopian tubes. Hormonal IUDs may also sometimes prevent ovulation. [22] [23] Copper IUDs do not contain any hormones, but release copper ions, which are toxic to sperm.
Modern IUDs, however, are designed differently and have a good safety profile. Hormonal IUDs available in the U.S. also do not contain estrogen, only progestin, which should minimize concern about ...
There are two types of IUDs currently available — copper IUDs that do not contain hormones and hormonal IUDs that release a synthetic version of the hormone progesterone that is called progestin.
Long-acting reversible contraception (LARC) LARC is a class of birth control used by about 10% of women who use contraception. This category includes intrauterine devices (IUDs) and the implant.
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