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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.
Levonorgestrel-releasing implant, sold under the brand name Jadelle among others, are devices that release levonorgestrel for birth control. [1] It is one of the most effective forms of birth control with a one-year failure rate around 0.05%. [1] [2] The device is placed under the skin and lasts for up to five years. [3]
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]
It’s worth pointing out, however, that for people who weigh over 165 pounds, levonorgestrel morning-after pills may not work, and those that weigh 195 pounds or more Ella may be less effective ...
In a 10-year study, the levonorgestrel coil was found to be as effective as oral medicines (tranexamic acid, mefenamic acid, combined oestrogen–progestogen or progesterone alone) for heavy periods; the same proportion of women had not had surgery for heavy bleeding and had similar improvements in their quality of life.
Levonorgestrel butanoate (LNG-B) (developmental code name HRP-002), [1] [2] or levonorgestrel 17β-butanoate, is a steroidal progestin of the 19-nortestosterone group which was developed by the World Health Organization (WHO) in collaboration with the Contraceptive Development Branch (CDB) of the National Institute of Child Health and Human Development as a long-acting injectable contraceptive.
A single preovulatory 10-mg dose of mifepristone delays ovulation by three to four days and is as effective an emergency contraceptive as a single 1.5-mg dose of the progestin levonorgestrel. [ 54 ] In women, mifepristone at doses greater or equal to 1 mg/kg antagonizes the endometrial and myometrial effects of progesterone.
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