Pratique du Shadowing: How does the morning-after pill prevent pregnancy? - Alison Edelman - Apprendre l'anglais à l'oral avec YouTube

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In a 2021 study, researchers asked over 500 participants a simple question:
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In a 2021 study, researchers asked over 500 participants a simple question:
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how does the morning-after pill work?
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Despite these pills widespread use, 60% answered incorrectly.
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Emergency contraceptives are often misunderstood.
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In fact, even the phrase “the morning-after pill” is a misnomer.
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So, how do they work?
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Each month, the brain and the ovaries prepare an egg to be released.
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First, a group of immature eggs start to grow protective, fluid-filled sacs called follicles.
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Around the eighth day, one of these follicles becomes mature or dominant, and the others are reabsorbed.
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At this point, the brain signals the pituitary gland to produce luteinizing hormone, often just called LH.
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A big surge in LH tells the dominant follicle to rupture, releasing the egg.
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This is ovulation.
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The egg travels to the fallopian tube, where it stays for about 24 hours, and it’s only in this very short window that it can be fertilized by sperm.
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The rise of LH also stimulates the production of a hormone called progesterone.
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When progesterone binds at specific receptors, this also helps to signal ovulation.
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And high levels of progesterone are vital for preparing the uterine lining to support the possible implantation of a fertilized egg.
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So, where do emergency contraceptive pills come into play?
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Emergency contraceptives are not abortion pills.
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Instead, they work much earlier in the process before pregnancy, by disrupting or delaying ovulation.
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There are two main types of pills.
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The first type, sometimes called Plan B, contains a molecule called levonorgestrel, which is structurally very similar to the body’s hormone, progesterone.
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When taken, levonorgestrel interferes with the production of LH.
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Because LH doesn’t surge, there’s no ovulation.
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That said, Plan B needs to be taken before an LH surge.
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It can’t prevent ovulation once LH starts rising.
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The second type of pill contains a molecule called ulipristal acetate.
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It works by blocking progesterone from binding at receptors, thereby delaying ovulation.
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Ulipristal acetate works even if LH has already begun to rise, which means it’s effective in a wider window of time than Plan B.
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Since both pills work by blocking or delaying ovulation, the name “the morning-after pill” can be misleading.
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Emergency contraceptives are most effective when taken as soon as possible after sex, to better the chance of disrupting ovulation before it occurs.
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There is no need to wait until morning.
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For this reason, many healthcare providers suggest having them on hand.
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Yet emergency contraceptives may still prevent pregnancy even if they’re taken 3 to 5 days after sex, depending on the pill.
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That’s because sperm can live in the reproductive tract for about five days.
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So, for example, if a person ovulates three days after having unprotected sex, there's still a chance of pregnancy.
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Since it's difficult to know exactly where someone is in their cycle, it’s best to take emergency contraceptives as soon as possible.
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But perhaps the most widely held misconception about these pills is that they can harm a person’s future fertility.
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Decades of research have shown that this isn’t the case, even if emergency contraceptives are taken multiple times.
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In fact, the effects of both pills are short lived, and they don't provide continued protection.
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It's recommended that a person uses condoms for the remainder of their cycle, and if they have unprotected sex again, then repeat use.
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Of course, emergency contraceptive pills aren’t failproof.
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As they neither prevent fertilization nor the implantation of a fertilized egg, these pills are ineffective if someone has already ovulated, or the LH surge has already peaked.
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However, there is a third option that can protect against pregnancy, even if a person has already ovulated.
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Many people know copper intrauterine devices, or IUDs, as a form of long-term birth control, but they also work to prevent pregnancy if inserted soon after unprotected sex.
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Unlike emergency contraceptive pills, a copper IUD can prevent pregnancy before and after fertilization.
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Copper is toxic to sperm and creates a uterine environment that makes implantation unlikely.
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Of course, copper IUDs might be less accessible in an emergency situation— they must be inserted by a trained healthcare provider.
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But on the upside, they continue to prevent pregnancy for at least 10 years while in place.
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Most healthcare providers agree that it's more effective, as well as less expensive, to use a regular form of birth control when trying to avoid pregnancy.
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But if or when you need it, emergency contraceptives are a safe option to use.

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About This Lesson

Dive into a fascinating and highly informative English lesson based on the video "How does the morning-after pill prevent pregnancy? - Alison Edelman." This video offers an in-depth explanation of a crucial medical topic, making it an excellent resource for advanced English speaking practice. You'll not only gain valuable scientific knowledge but also enhance your ability to discuss complex subjects with clarity and precision.

Through this content, learners will practice:

  • Specialized Vocabulary: Acquire medical and biological terms related to human reproduction, hormones, and emergency contraception. This is vital for expanding your general and academic English fluency.
  • Explaining Processes: Master the language needed to describe sequential processes and cause-and-effect relationships, a key skill for `IELTS speaking` and academic presentations.
  • Dispelling Misconceptions: Learn how to articulate common misunderstandings and provide accurate information, improving your persuasive and informative speaking abilities.
  • Grammar for Explanation: Observe and practice using complex sentence structures, conditional clauses, and passive voice, which are frequently used in scientific explanations.

Key Vocabulary & Phrases

  • Misnomer: (noun) A wrong or inaccurate name or designation. (e.g., "The phrase 'morning-after pill' is a misnomer.")
  • Luteinizing Hormone (LH): (noun) A hormone that plays a crucial role in the menstrual cycle, signaling ovulation. (e.g., "A big surge in LH tells the dominant follicle to rupture.")
  • Ovulation: (noun) The release of an egg from an ovary. (e.g., "Emergency contraceptives work by disrupting or delaying ovulation.")
  • Disrupting or delaying: (verb phrase) To interrupt the normal course of something or cause it to happen later. (e.g., "These pills work by disrupting or delaying ovulation.")
  • Failproof: (adjective) Incapable of failing or going wrong. (e.g., "Emergency contraceptive pills aren’t failproof.")
  • On hand: (idiom) Available and ready for use. (e.g., "Many healthcare providers suggest having them on hand.")
  • Reproductive tract: (noun) The system of organs involved in sexual reproduction. (e.g., "Sperm can live in the reproductive tract for about five days.")
  • Copper IUD: (noun) An abbreviation for a copper intrauterine device, a form of birth control that can also be used for emergency contraception. (e.g., "Many people know copper IUDs as a form of long-term birth control.")

Practice Tips for This Video

This video features clear, articulate speech at a moderate pace, making it ideal for targeted shadowing technique practice, especially for learners aiming for higher levels of English fluency. Here are some specific tips:

  • Focus on Precision: The topic involves specific scientific terms. Pay close attention to the speaker's pronunciation practice of words like "levonorgestrel," "ulipristal acetate," "follicles," and "pituitary." Repeat these terms slowly and accurately.
  • Break Down Complex Sentences: The video explains intricate biological processes. Pause after each key idea or sentence to fully understand the meaning and then attempt to rephrase it in your own words. This active recall strengthens comprehension and speaking skills, similar to how you might prepare for `IELTS speaking` Part 3.
  • Practice Explaining Processes: Identify phrases used to describe sequences and cause-and-effect (e.g., "First, a group...", "Around the eighth day...", "A big surge... tells...", "works by blocking..."). Shadow these patterns to improve your ability to explain complex events in English.
  • Intonation for Clarity: Notice how the speaker uses intonation to emphasize important information or differentiate between facts and common misconceptions. Mimic these vocal patterns during your English speaking practice to sound more natural and authoritative.
  • Reiterate Misconceptions: The video highlights common misunderstandings. Practice articulating these myths and then correcting them using the factual information provided, enhancing your ability to communicate nuanced information effectively.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

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