When to take postinor 2: This is a popular emergency contraceptive pill used to prevent pregnancy after unprotected sex or contraceptive failure. Its effectiveness depends heavily on when you take it.
My article explains when to take Postinor 2, how it works, and what happens if you take it too early or too late — based on clinical guidance and expert-reviewed evidence.
When to take postinor 2
Postinor 2 contains levonorgestrel, a synthetic form of the hormone progestin, which helps prevent pregnancy by:
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Delaying or inhibiting ovulation
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Preventing fertilization
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Making the uterine lining less receptive to implantation
It comes in a single 1.5mg tablet or two 0.75mg tablets taken 12 hours apart (depending on brand/formulation).
When Should You Take Postinor 2?
✅As soon as possible after unprotected sex.
The earlier you take it, the more effective it is at preventing pregnancy:
| Time After Sex | Effectiveness Estimate |
|---|---|
| Within 24 hours | ~95% effective |
| Within 48 hours | ~85% effective |
| Within 72 hours | ~58% effective |
| After 72 hours | Not effective |
Key Scenarios for Using Postinor 2
You should take Postinor 2 within 72 hours if any of the following occurs:
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Unprotected sex
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Missed birth control pills (more than 2)
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Condom slipped, broke, or leaked
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Sexual assault without protection
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Partner ejaculated inside without protection
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Misuse of withdrawal method (e.g., didn’t pull out in time)
Important Timing Considerations
1. Take It Immediately — Don’t Wait
Every hour counts. Taking Postinor 2 within 12 to 24 hours gives you the best chance to prevent pregnancy.
2. Don’t Take It Before Sex
Postinor 2 is not a regular contraceptive. It does not protect you before sex like birth control pills or condoms.
3. Don’t Delay Past 72 Hours
After 3 days (72 hours), the pill loses effectiveness. For emergencies after 72–120 hours, consider ellaOne (ulipristal acetate) or a copper IUD from a doctor.
When in Your Cycle Should You Take Postinor 2?
Postinor 2 works best when taken before ovulation. If you’ve already ovulated, it may be less effective, as it cannot stop an egg that’s already been released.
However, since you can’t always know exactly when you ovulate, it’s safest to take it anytime after unprotected sex — as long as it’s within 72 hours.
Can You Take Postinor 2 Twice in One Cycle?
You can, but it is not recommended unless absolutely necessary.
Risks of taking it more than once per cycle:
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Menstrual irregularities
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Hormonal imbalance
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Reduced effectiveness
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Increased side effects
Instead, consider switching to regular birth control if you find yourself using emergency contraception frequently.
Can You Take Postinor 2 After Ovulation?
It may not be effective after ovulation because its main action is to delay ovulation. If the egg has already been released and fertilized, Postinor 2 is unlikely to prevent pregnancy.
You may consider a copper IUD for emergency contraception up to 5 days after ovulation, as it works differently.
What Happens If You Take Postinor 2 Too Late?
If taken after 72 hours, its effectiveness drops sharply.
In that case:
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You’re at higher risk of pregnancy
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You should take a pregnancy test if your period is late
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Consult a healthcare provider about alternatives like ellaOne or an IUD
Summary: Best Time to Take Postinor 2
| Situation | Action |
|---|---|
| Within 24 hours of unprotected sex | Take immediately for best results |
| Within 48–72 hours | Still effective, but less than earlier use |
| After 72 hours | Not recommended — consult a doctor |
| After ovulation (if known) | Postinor may not work — consider IUD |
| Before sex | No — not for advance protection |
Final Thoughts
Postinor 2 is a safe and effective emergency contraceptive — but only if taken at the right time. Always use it within 72 hours of unprotected sex, ideally as early as possible.
If you find yourself needing emergency contraception frequently, it may be time to switch to a long-term birth control method. Talk to your doctor for options tailored to your needs.
FAQs
1. Can I take Postinor 2 after 5 days?
No. It’s only effective up to 72 hours (3 days). After that, talk to a doctor about ellaOne or IUDs.
2. Can I take it during my period?
Yes, but it’s unnecessary. Ovulation does not occur during menstruation.
3. Is it safe for teenagers?
Yes, its safe for teens, but medical guidance is recommended.
4. Will it affect my future fertility?
No. Emergency contraception does not affect long-term fertility.
References
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World Health Organization (WHO) – Emergency Contraception Guidelines
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Planned Parenthood – Emergency Contraceptive Pill Facts
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American College of Obstetricians and Gynecologists (ACOG)