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 The one-pill dose works by delaying ovulation with a hormone called levonorgestrel. Jenna Ryu, USA TODAY, 19 July 2022 There are several types of morning-after pills: Plan B, perhaps the most well-known, consists of the synthetic hormone levonorgestrel and works by preventing or delaying ovulation. Tanya Lewis, Scientific American, 1 July 2022 Other generic brands of levonorgestrel include Take Action, My Way, and My Choice, among others and can be ordered online or bought in drug stores. Alexa Mikhail, Fortune, 1 July 2022 Hormonal IUDs, including Kyleena, Skyla, Mirena, and Liletta, work by releasing the hormone levonorgestrel, a form of progestin. Sara Lindberg, SELF, 16 Mar. 2022 At the one-year mark, researchers discovered that patients with a levonorgestrel (hormonal) IUD had the lowest pregnancy rates, followed by those who had a tubal ligation and those with a copper (non-hormonal) IUD. Korin Miller, Health.com, 1 Mar. 2022 In all three cases, medical professionals and pharmacists seemed to have conflicting opinions over whether double dosing levonorgestrel was the correct thing to do. Rose Stokes, refinery29.com, 5 Dec. 2021 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, 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, 4 Dec. 2019 See More

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.

First Known Use of levonorgestrel

1977, in the meaning defined above

History and Etymology for levonorgestrel

lev- + norgestrel, a progestin

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The first known use of levonorgestrel was in 1977

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Last Updated

28 Jul 2022

Cite this Entry

“Levonorgestrel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/levonorgestrel. Accessed 15 Aug. 2022.

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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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