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2. Levonorgestrel - Wikipedia

   en.wikipedia.org/wiki/Levonorgestrel

   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.

3. Progestogen (medication) - Wikipedia

   en.wikipedia.org/wiki/Progestogen_(medication)

   The progestins assessed included depot medroxyprogesterone acetate, levonorgestrel-containing contraceptive implants and intrauterine devices, and progestogen-only birth control pills. [51] Findings of large observational studies are mixed due to prominent confounding factors , but overall show no association of hormonal birth control with ...

4. Levonorgestrel-releasing implant - Wikipedia

   en.wikipedia.org/wiki/Levonorgestrel-releasing...

   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]

5. What you need to know about over-the-counter birth control

   www.aol.com/lifestyle/know-over-counter-birth...

   Levonorgestrel is a tablet taken by mouth, and it's designed to be used as soon as possible within 72 hours of having unprotected sex, according to MedlinePlus. How effective is it? Is it safe to use?

6. Norgestrel - Wikipedia

   en.wikipedia.org/wiki/Norgestrel

   Norgestrel is a progestogen, or an agonist of the progesterone receptor. [6] The biological activity of norgestrel lies in the levo enantiomer, levonorgestrel, whereas the dextro isomer is inactive. [6]

7. Norgestimate - Wikipedia

   en.wikipedia.org/wiki/Norgestimate

   Norgestimate is a rapidly and completely converted prodrug, mainly of norelgestromin (17β-deacetylnorgestimate or levonorgestrel 3-oxime), but also of levonorgestrel (3-keto-17β-deacetylnorgestimate) to a lesser extent (22 ± 6% of an administered dose or about 40–70 μg) [2] and of levonorgestrel acetate (levonorgestrel 17β-acetate) in ...