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Levonorgestrel is a hormonal medication which is used in a number of birth control methods. [3] [7] It is combined with an estrogen to make combination birth control pills. [8]As an emergency birth control, sold under the brand names Plan B One-Step and Julie, among others, it is useful within 72 hours of unprotected sex.
The levonorgestrel implant is a type of long-acting reversible birth control. [5] It primarily works by stopping ovulation and by thickening the mucus around the cervix. [4] A levonorgestrel-releasing implant was approved for medical use in 1983 in Finland and in the United States in 1990. [1]
A hormonal intrauterine device (IUD), also known as an intrauterine system (IUS) with progestogen and sold under the brand name Mirena among others, is an intrauterine device that releases a progestogenic hormonal agent such as levonorgestrel into the uterus. [2]
“A levonorgestrel-releasing IUD is a small device inserted into the uterus that releases a hormone called levonorgestrel,” Mørch continued. “This hormone prevents pregnancy by thickening ...
Hormonal IUDs (referred to as intrauterine systems in the UK) work by releasing a small amount of levonorgestrel, a progestin. Each type varies in size, amount of levonorgestrel released, and duration. The primary mechanism of action is making the inside of the uterus uninhabitable for sperm. [47]
Combined oral contraceptive pills work to suppress the growth of the extra-uterine endometrial tissue. This works to lessen its inflammatory effects. [37] Combined oral contraceptive pills, along with the other medical treatments listed above, do not eliminate the extra-uterine tissue growth, they just reduce the symptoms.
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