le·​vo·​nor·​ges·​trel | \ ˌlē-və-nȯr-ˈje-strəl How to pronounce levonorgestrel (audio) \

Definition of levonorgestrel

: the levorotatory form of a synthetic progestin C21H28O2 used especially in oral contraceptives

Examples of levonorgestrel in a Sentence

Recent Examples on the Web But in the late 1980s and early 2000s, the IUD regained popularity with the Food and Drug Administration’s approval of the copper ParaGard and levonorgestrel-releasing Mirena. Julia Calderone, New York Times, "10 Years of Fertility Advances," 19 Apr. 2020 The new contraceptive is made to sit in the stomach and gradually release the birth control drug levonorgestrel over the course of three weeks. BostonGlobe.com, "Researchers at the Massachusetts Institute of Technology say they are developing a monthly birth control pill.," 4 Dec. 2019 Except each arm is made of a body-friendly silicone polymer bonded with levonorgestrel—the hormone used in IUDs like Mirena. Wired, "A Once-a-Month Birth Control Pill Is Coming—Here's How It Works," 4 Dec. 2019 Encased in the microneedles is a dose of levonorgestrel (LNG), the drug most frequently used in intrauterine devices (IUDs) and other forms of contraceptive implants. Claire Bugos, Smithsonian, "Will Microneedle Patches Be the Future of Birth Control?," 6 Nov. 2019 Your other option is an OTC morning-after pill like Plan B or Next Choice, both of which use levonorgestrel, a synthetic version of the hormone progesterone, to delay ovulation. Zahra Barnes, SELF, "6 Ways You Can Still Get Pregnant After Taking Emergency Contraception," 18 July 2019 Ella is among the more common brands of emergency contraceptive pills containing ulipristal acetate (which requires a prescription), and Plan B contains levonorgestrel (and is available over the counter). Brittney Mcnamara, Allure, "Shrill Is Right About the Impact of Your Weight on the Morning-After Pill's Efficacy," 25 Mar. 2019 Ella is one of the more common brands of emergency contraceptive pills containing ulipristal acetate (which requires a prescription), while Plan B contains levonorgestrel (and is available over the counter). Brittney Mcnamara, Teen Vogue, "Emergency Contraceptives May Be Less Effective for People Over a Certain Weight," 19 Mar. 2019 The researchers found that, overall, IUDs containing 52 micrograms of levonorgestrel (that would be Mirena and Liletta—the others contain less of the hormone) seemed to be similarly effective at seven years as at three and five. Korin Miller, SELF, "When Is It OK to Get Your IUD Removed?," 12 Mar. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'levonorgestrel.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of levonorgestrel

1977, in the meaning defined above

History and Etymology for levonorgestrel

lev- + norgestrel, a progestin

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Time Traveler for levonorgestrel

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The first known use of levonorgestrel was in 1977

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Last Updated

28 May 2020

Cite this Entry

“Levonorgestrel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/levonorgestrel. Accessed 4 Jul. 2020.

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More Definitions for levonorgestrel


le·​vo·​nor·​ges·​trel | \ ˌlē-və-nȯr-ˈjes-trəl How to pronounce levonorgestrel (audio) \

Medical Definition of levonorgestrel

: a synthetic progestin C21H28O2 that is used especially in birth control pills and contraceptive implants and that is the levorotatory form of norgestrel — see mirena, plan b, seasonale, seasonique

More from Merriam-Webster on levonorgestrel

Britannica.com: Encyclopedia article about levonorgestrel

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