- What Is Emergency Contraception and How Does It Work?
- The Real Numbers — How Effective Is It at Preventing Pregnancy?
- Why Can You Still Get Pregnant After Taking It? (6 Reasons)
- Misconceptions You Need to Stop Believing
- Which Contraception Is "More Reliable"
- When Should You Get Tested or See a Doctor — Consult in Phitsanulok
- Frequently Asked Questions
- References
Recently there's been drama involving a celebrity-influencer couple that left a lot of people wondering at the same time, "How can someone still get pregnant after taking emergency contraception?" I won't comment on anyone's private life, but I'd like to use this opportunity to share the real facts instead — emergency contraception prevents pregnancy well but not 100%. The WHO states it can prevent pregnancy "in over 95%" of cases when taken within 5 days, and the sooner the better · It reduces the chance of pregnancy from a single act of intercourse mid-cycle from around 8% to ~1–2%, but not zero, and if taken close to ovulation the chance of failure can still be as high as ~18–35%, because the drug's main action is to "delay ovulation," not to terminate a pregnancy.
What Is Emergency Contraception and How Does It Work?
Emergency contraception is used "after" unprotected intercourse to reduce the chance of pregnancy. There are 2 main types in use: levonorgestrel (the kind commonly available over the counter in Thailand) and ulipristal acetate (such as ellaOne). The key thing to understand is that its main mechanism is to "delay or inhibit ovulation." If the egg hasn't been released yet, it works well, but if ovulation has already occurred before you take it, its effectiveness drops considerably.
Emergency contraception is like a "brake on ovulation," not an "undo on pregnancy." Hit the brake in time before the egg is released and there's a chance to prevent it, but if the egg has already been released, the brake doesn't help much — and we usually don't know for sure which day ovulation will happen. This is why it can "never guarantee 100%."
The Real Numbers — How Effective Is It at Preventing Pregnancy?
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Consult Dr. TimeThis is the part I most want everyone to know — the figures from reliable sources.
- WHO: Prevents pregnancy in "over 95%" of cases when taken within 5 days
- Looking at the real risk: a single act of intercourse mid-cycle carries an average pregnancy chance of around 8% · levonorgestrel reduces it to around 1–2%
- NHS: Of people who take the pill form, around 1–3% still get pregnant · ellaOne tends to be more effective than Levonelle
- The decisive factor is the timing of ovulation: taken close to the day of ovulation, the chance of still getting pregnant can surge to ~18–35%
| Factor | Effect on Chance of Preventing Pregnancy |
|---|---|
| Taken quickly (within a few hours) | Most effective |
| The later it's taken (approaching 72–120 hrs) | Effectiveness gradually declines |
| Taken when the egg hasn't been released yet | Works well, low chance of pregnancy |
| Taken near/after ovulation | Works poorly, chance of pregnancy still high |
Emergency contraception "reduces" the chance of pregnancy — it doesn't "eliminate" it — lowering it from around 8% to 1–2% helps a great deal, but it's not 0%. Anyone who thinks they're definitely safe after taking it may be holding the most dangerous misconception of all.
Why Can You Still Get Pregnant After Taking It? (6 Reasons)
- 1. Taken too late — the later it is, the less effective
- 2. The egg has already been released — the drug delays ovulation, so once the egg is out it barely helps
- 3. High body weight / BMI — may reduce the effectiveness of levonorgestrel
- 4. Vomiting within 2–3 hours after taking it — the drug isn't fully absorbed
- 5. Having unprotected intercourse again "after" taking the pill — the drug doesn't cover the next time
- 6. Using it too often in place of regular contraception — the accumulated risk is much higher
Misconceptions You Need to Stop Believing
- "It's an abortion pill" — not true; it prevents pregnancy by delaying ovulation, and if you're already pregnant the drug does not end the pregnancy
- "It's 100% safe once taken" — not true; there's still a 1–3% chance of pregnancy (higher if taken close to ovulation)
- "You can take it often instead of regular birth control" — you shouldn't; it's less protective and disrupts your cycle
- "It also protects against sexually transmitted infections" — not true; only condoms help reduce STIs
Which Contraception Is "More Reliable"
Emergency contraception is meant for genuine "emergencies," not for regular use. Here are the real-world (typical use) chances of "failure" per year.
| Contraceptive Method | Chance of Failure per Year | Protects Against STIs? |
|---|---|---|
| Implant / IUD | Less than 1% | No |
| Monthly birth control pill / patch / ring | Around 7–9% | No |
| Condom | Around 13% | Yes (helps reduce them) |
| Emergency contraception (used repeatedly in place of regular birth control) | Much higher than all the methods above | No |
Choose a regular contraceptive method that suits you (talk to your doctor), then use condoms alongside it to protect against STIs, and keep emergency contraception only for genuine emergencies. You'll feel more at ease and face much less risk.
When Should You Get Tested or See a Doctor — Consult in Phitsanulok
After taking the pill, your period may come a little earlier or later than usual, but if it's more than 1 week late, you should take a pregnancy test, and if the result is unclear or you have unusual symptoms such as severe lower abdominal pain or abnormal bleeding, you should see a doctor. Knowing early helps you plan in time, whichever way the result turns out.
Contraception is a personal matter that shouldn't be decided based on news or unreliable information. At de Pry Clinic, Phitsanulok, Dr. Time is glad to offer health advice in a neutral and respectful way — don't buy medication or rely on dubious information to make the decision on your own. A single conversation with a doctor can help more than you'd think, and there's nothing to be ashamed of.
References
I'd like you to be able to verify the figures I've used for yourself:
- WHO — emergency contraception prevents pregnancy in over 95% of cases when used within 5 days: who.int
- NHS — effectiveness, drug types, and a pregnancy chance of around 1–3%: nhs.uk
- Guttmacher Institute — comparison of contraceptive effectiveness (chance of failure per year): guttmacher.org
- PubMed Central (PMC) — review of levonorgestrel for emergency contraception (ovulation timing as the decisive factor): pmc.ncbi.nlm.nih.gov
- Office on Women's Health (USA) — fact sheet on emergency contraception: womenshealth.gov
