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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.
Those include Plan B One-Step, Take Action, My Way, Option 2, Preventeza, AfterPill, My Choice, Aftera, EContra and Morning After Pill. ... Levonorgestrel is a tablet taken by mouth, ...
In comparison, oral contraceptives can contain 150 micrograms of levonorgestrel. [53] The hormonal IUD releases the levonorgestrel directly into the uterus, as such its effects are mostly paracrine rather than systemic. Most of the drug stays inside the uterus, and only a small amount is absorbed into the rest of the body. [53]
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]
levonorgestrel 13.5 mg levonorgestrel 52 mg levonorgestrel 19.5 mg levonorgestrel Initial amount released None 20 μg/day 14 μg/day 18.6 μg/day 16 μg/day Approved effectiveness 10 years (12 years) 5 years (10 years) 3 years 3 years (5 years) 5 years Mechanism of action Copper toxic to sperm
Emergency contraception (EC) is a birth control measure, used after sexual intercourse to prevent pregnancy.. There are different forms of EC. Emergency contraceptive pills (ECPs), sometimes simply referred to as emergency contraceptives (ECs), or the morning-after pill, are medications intended to disrupt or delay ovulation or fertilization, which are necessary for pregnancy.
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