Emergency Contraception — What It Is, How It Works, Methods & When to Use It
By
Gynecologist & pregnancy doctor
If you are reading this in a moment of uncertainty — take a breath. You are not alone, and you are doing the right thing by seeking information.
Emergency contraception is a safe, legal, and medically supported option available to women when regular contraception has failed, was not used or incorrectly used, or when intercourse was not consensual. It is not a topic that should carry shame or judgement — it is health information, and every woman deserves access to it.
This article covers what emergency contraception is, how each method works, when and how to use it, what to expect, and the current regulatory landscape in India. The information here is drawn from WHO guidelines, Indian government recommendations, and current medical evidence.
ARTICLE OUTLINE
What You Will Learn in This Article
Reading time: approx. 8–10 minutes
What is Emergency Contraception? — Definition, Scope & Critical Clarifications
Emergency Contraception Is Not an Abortion — An Important Medical Distinction
When Emergency Contraception Can Be Used — Situations It Covers
Types of EC Pills — Levonorgestrel, Ulipristal Acetate, and COCs
The Copper IUD as Emergency Contraception — The Most Effective Option
How Emergency Contraception Works — The Mechanism Simply Explained
Safety, Side Effects & What to Expect
India Regulatory Context — What Requires a Prescription
Ongoing Contraception After EC — What Comes Next
Frequently Asked Questions (FAQs)
What is Emergency Contraception? — Definition and Important Clarifications
Emergency contraception (EC) refers to methods of contraception used to prevent pregnancy after unprotected sexual intercourse, or after a contraceptive failure has already occurred.
The key word is 'emergency' — these methods are designed for specific, time-sensitive situations. They are not intended to replace regular, ongoing contraception. They are a safety net when something has gone wrong, or when regular contraception was not possible.
WHO Definition:
"Emergency contraception refers to methods of contraception that can be used to prevent pregnancy after unprotected sexual intercourse or potential contraceptive failure. These are recommended for use within 5 days but are more effective the sooner they are used after the act of intercourse."
World Health Organization (WHO), Emergency Contraception Fact Sheet (2021)
Emergency Contraception Is Not an Abortion — A Critical Distinction
This is perhaps the most important clarification in this entire article — and one of the most commonly misunderstood points about emergency contraception.
Emergency contraceptive pills work by preventing or delaying ovulation, or by interfering with fertilisation. They do not end an established pregnancy. They do not affect an embryo that has already implanted in the uterus.
The copper IUD, when used as emergency contraception, works by preventing fertilisation through its effect on sperm function. It also prevents implantation if fertilisation has already occurred, but at the time of insertion, established pregnancy should not be there.
✔ Medical Consensus — EC Is Not an Abortifacient
Emergency contraceptive pills CANNOT interrupt an established pregnancy.
Emergency contraceptive pills CANNOT harm a developing embryo.
If taken by a woman who is already pregnant, EC pills have no effect on the pregnancy — they do not cause miscarriage.
This is a confirmed position of the WHO, the American College of Obstetricians and Gynecologists (ACOG), and the Federation of Obstetric and Gynaecological Societies of India (FOGSI).
EC is not abortion. Abortion ends an established pregnancy. EC prevents one from beginning.
When Can Emergency Contraception Be Used?
Emergency contraception can be used in any of the following situations following unprotected sexual intercourse:
When contraceptive method was not used
Following sexual assault, when the woman was not protected by an effective contraceptive
Condom failure: breakage, slippage, or incorrect use
Missed oral contraceptive pills: 3 or more consecutively missed combined pills; or the progestogen-only pill taken more than 3 hours late (or more than 12 hours late for the desogestrel-containing 0.75 mg pill)
Injectable contraceptive overdue: more than 2 weeks late for NET-EN injection; more than 4 weeks late for DMPA injection; more than 7 days late for combined injectable contraceptive (not available in India).
Barrier method failure: dislodgment, breakage, or early removal of a diaphragm or cervical cap
Other contraceptive failures: failed withdrawal method; failed spermicide; miscalculation during fertility awareness methods; expulsion of an IUD or implant
Advance Supply
It is medically appropriate for a doctor to provide an advance supply of emergency contraceptive pills to a woman, so she has them available if needed and can take them as soon as possible after unprotected intercourse or contraceptive failure.
Taking EC as early as possible after the event significantly improves its effectiveness.
Emergency Contraception vs. Regular Contraception — Key Differences
| Feature | Emergency Contraception | Regular Contraception |
|---|---|---|
| Purpose | Prevent pregnancy after unprotected intercourse has occurred | Prevent pregnancy before or during intercourse |
| Timing | Used after the event — time-sensitive (hours to days) | Used consistently, on an ongoing basis |
| Frequency | For occasional, emergency use only — not a primary contraceptive method | Daily, weekly, monthly, or long-acting depending on method |
| STI Protection | Does NOT protect against sexually transmitted infections | Barrier methods(Condoms, diaphragm, cervical cap) protect against STIs; other methods do not |
| Effectiveness | Effective if used promptly and within time— decreases with time | Consistently high with correct, ongoing use |
Types of Emergency Contraception — Pills and the Copper IUD
There are two main categories of emergency contraception: emergency contraceptive pills (ECPs) and the copper-bearing intrauterine device (Copper IUD). Within EC pills, there are three types. Here is each one explained clearly.
Emergency Contraceptive Pills Containing Levonorgestrel (LNG) — The Morning After Pill
Levonorgestrel-based emergency contraceptive pills are the most widely available and commonly used EC option in India. They are available without a prescription at pharmacies under the National Reproductive and Child Health Programme.
How to take it: A single dose of 1.5 mg taken as soon as possible after unprotected intercourse or contraceptive failure. Alternatively, two doses of 0.75 mg taken 12 hours apart — both doses must be completed within 72 hours of intercourse.
Effectiveness: Approximately 85–89% effective in preventing pregnancy when taken within 72 hours. Effectiveness decreases with each passing hour — earlier is significantly better.
Time window: Must be taken within 72 hours (3 days) for optimal effectiveness. Can be taken up to 120 hours (5 days) but is less effective the later it is used.
Availability in India: Available over the counter without a prescription. Levonorgestrel has been approved in India since 2001 and included in the national family planning programme since 2005.
Time Is Critical — Take It as Soon as Possible
Levonorgestrel EC pills are most effective when taken within the first 12–24 hours after unprotected intercourse.
They retain significant effectiveness through 72 hours — but every hour matters.
Effectiveness drops measurably between 24–72 hours, and further after 72 hours.
Do not wait to see if your period comes — take it as soon as possible if you need it.
Emergency Contraceptive Pills Containing Ulipristal Acetate (UPA)
Ulipristal acetate is a more recently developed EC pill with a distinct advantage: it maintains better effectiveness through the full 120-hour (5-day) window compared to Levonorgestrel, and is particularly effective when taken between 72 and 120 hours after intercourse — a period when LNG effectiveness drops significantly.
Dose: A single dose of 30 mg.
Effectiveness: Less than 2% pregnancy rate — more effective than LNG, particularly in the 72–120 hour window.
Time window: Can be used up to 120 hours (5 days) after unprotected intercourse, with better maintained effectiveness than LNG across this full window.
Availability in India: As of early 2025, UPA is not yet commercially available in India. The 92nd DTAB meeting (April 2025) has recommended adding UPA to Schedule H — meaning it will require a doctor's prescription when it becomes available.
After UPA: Women who take UPA should wait until the 6th day after taking it before resuming or starting a progestogen-containing contraceptive method. A copper IUD can be inserted immediately after UPA.
⚠ UPA and Progestogen-Containing Contraceptives
Unlike LNG, UPA interacts with progestogen-containing methods (including progestogen-only pills and combined hormonal contraception).
After taking UPA, wait until the 6th day before resuming any progestogen-containing contraceptive.
Use condoms or abstain from intercourse during this waiting period.
A doctor's guidance is recommended before and after UPA use.
Combined Oral Contraceptive Pills (COCs) — The Yuzpe Method
Before dedicated EC pills were widely available, combined oral contraceptive pills were used in higher doses as emergency contraception. This is known as the Yuzpe method.
Dose: Two doses, each containing 100 mcg of ethinyl estradiol plus 0.50 mg of levonorgestrel, taken 12 hours apart — within 120 hours of intercourse.
Effectiveness: Approximately 75% effective — considerably lower than dedicated EC pills.
Current use: This method is now used less frequently in settings where dedicated EC pills are available, due to its lower effectiveness and higher rate of nausea and vomiting. EC pills with LNG or UPA are strongly preferred.
Comparing EC Pill Options — Effectiveness, Timing & Availability in India
| EC Method | Dose | Time Window | Effectiveness | Available OTC in India? |
|---|---|---|---|---|
| LNG Pills (1.5 mg) | Single dose of 1.5 mg OR two doses of 0.75 mg, 12 hrs apart | Best within 72 hrs; up to 120 hrs | ~85–89% (within 72 hrs) | Yes — available without prescription |
| UPA Pills (30 mg) | Single dose of 30 mg | Up to 120 hrs; most useful 72–120 hrs | ~98% (less than 2% pregnancy rate) | Not yet available in India (early 2025). Will require a prescription when available. |
| COCs (Yuzpe Method) | Two doses of 100 mcg EE + 0.50 mg LNG, 12 hrs apart | Within 120 hrs | ~75% | Requires prescription (combined pill) |
| Copper IUD (CuT) | Inserted by a doctor | Within 120 hrs (5 days) | More than 99% — most effective | Requires clinic visit and insertion by a trained medical professional |
Effectiveness figures are approximate and based on WHO data and published clinical trials. Individual effectiveness depends on timing, body weight, and proximity to ovulation.
Copper-Bearing Intrauterine Device (Copper IUD / CuT) — The Most Effective Option
The copper-bearing intrauterine device, when inserted within 120 hours (5 days) of unprotected intercourse, is the single most effective form of emergency contraception available — with a pregnancy rate of less than 1%.
How it is used: Inserted by a trained healthcare provider within 5 days of unprotected intercourse.
Effectiveness: Over 99% effective as emergency contraception.
Dual benefit: Once inserted, the copper IUD provides highly effective ongoing contraception for up to 10 years if the woman chooses to continue using it. Alternatively, it can be removed after the next menstrual period if she prefers another contraceptive method.
Who should consider it: Women who want the most reliable EC option available, or who would also benefit for long-term contraception, or who prefer not to take hormonal pills.
Requires a clinic visit: The copper IUD must be inserted by a trained doctor or midwife. It is not available over the counter.
How Emergency Contraception Works — The Science Simply Explained
How EC Pills Work in the Body
The primary mechanism of action of emergency contraceptive pills is the prevention or delay of ovulation — the release of an egg from the ovary.
In simple terms: if the egg is not released, then there is nothing for sperm to fertilise, and pregnancy cannot occur. EC pills work by temporarily disrupting the hormonal signals that trigger ovulation, effectively buying time until sperm (which can survive in the reproductive tract for up to 5 days) are no longer viable.
EC pills may alter cervical mucus and thus reduce the ability of sperm to reach and fertilise an egg, it slows down muscular contractions of fallopian tubes, this impairs the ability of sperm and eggs to travel through the tubes, significantly reducing the chances of fertilization, and it may affect the uterine lining in a way that makes fertilisation less likely. However, if fertilisation has already occurred and an embryo has implanted in the uterine wall, EC pills have no effect — the pregnancy continues normally.
How the Copper IUD Works as Emergency Contraception
The copper IUD works through a different mechanism. Copper ions released by the device are toxic to sperm — they impair sperm motility and function, reducing the ability of sperm to reach and fertilise an egg. This is the primary mechanism of action.
The copper IUD may also prevent implantation if fertilisation has occurred, though the primary effect is on sperm function before fertilisation. As with EC pills, the copper IUD also cannot end a pregnancy that has already been established.
Safety and Side Effects — What to Expect
Emergency contraceptive pills are medically safe for use by the vast majority of women. Side effects, when they occur, are mild and short-lived.
Common side effects of EC pills include:
Nausea — the most common side effect; more frequent with COC-based EC than with LNG or UPA pills
Vomiting — if vomiting occurs within 2 hours of taking an EC pill, the dose should be repeated
Irregular vaginal bleeding or spotting — this can occur and is not a cause for alarm
Breast tenderness — temporary and mild
Fatigue or headache — generally resolves within 24 hours
Changes in the next menstrual period — it may arrive earlier or later than expected; this is normal
EC pills do not cause long-term side effects. They do not affect future fertility — menstrual cycles return to normal after use, and there is no delay in the return of fertility.
EC pills with LNG or UPA cause significantly less nausea and vomiting than the COC-based Yuzpe method — another reason dedicated EC pills are preferred when available.
If Vomiting Occurs
If you vomit within 2 hours of taking an EC pill, the absorbed dose may be insufficient.
In this case, the dose should be repeated.
Contact a pharmacist or doctor if you are unsure whether to repeat the dose.
Anti-nausea medications are not routinely recommended before taking EC, but can be discussed with a doctor if nausea is a significant concern.
Side effects of IUD- Generally safe with very minimal side effects.
Side effects include-
Pelvic inflammatory disease
Displacement or moving out of IUD
Occasional per vaginal spotting or bleeding.
Important: What Emergency Contraception Does NOT Do
Alongside what EC does do, it is equally important to be clear about what it does not do:
It does not protect against sexually transmitted infections (STIs) or HIV. Only barrier methods (condoms) provide STI protection. If there is any concern about STI exposure, please speak to a doctor promptly.
It does not end a pregnancy that has already been established. EC is not an abortifacient.
It does not provide protection against future unprotected intercourse. EC provides no ongoing contraceptive protection after it is taken.
It is not 100% effective. No contraceptive method is. If your next period is delayed by more than a week, take a pregnancy test and consult your gynec.
It is not a substitute for regular contraception. Routine use of EC pills is not recommended as a primary contraceptive strategy. If you find yourself needing EC frequently, a conversation with a doctor about suitable long-term contraceptive options is strongly recommended.
Using Emergency Contraception Responsibly — Indian Regulatory Context & Guidance
Availability in India — What Requires a Prescription and What Does Not
Understanding the current regulatory status of EC in India is important for both access and accurate guidance:
Levonorgestrel EC pills (1.5 mg or 0.75 mg): Available without a prescription at pharmacies across India. Approved since 2001 and included in the national family planning programme since 2005. Also included in the ASHA community health worker drug kit since 2011.
Ulipristal Acetate (UPA): Not yet commercially available in India as of early 2025. The 92nd DTAB meeting (April 2025) has recommended adding it to Schedule H — meaning when UPA does become available in India, it will require a doctor's prescription.
COC-based EC (Yuzpe method): Requires a prescription for the combined oral contraceptive pills used.
Copper IUD: Requires a clinic visit and insertion by a trained healthcare provider.
New Government Warnings on Levonorgestrel Tablets (2024–2025)
India's Drug Technical Advisory Board (DTAB) recently completed a two-year regulatory review of levonorgestrel-based EC pills — the most significant labelling overall since the pills entered the Indian market in 2002.
Three mandatory boxed warnings are now required on all levonorgestrel EC tablet packaging:
The pill does not offer any protection against HIV or other sexually transmitted infections.
The pill should not be taken more than twice in a month.
Use of alternative methods of contraception is encouraged in consultation with a registered medical practitioner.
These warnings are an important public health clarification — not a restriction on access. Levonorgestrel remains available over the counter. The intent is to correct widespread misconceptions, particularly the false belief that EC pills protect against STIs.
The proposal to move levonorgestrel to Schedule H (requiring a prescription) was considered and rejected by the central committee. OTC access remains in place.
Emergency Contraception and Ongoing Contraception — What Comes Next
After using emergency contraception, establishing a reliable ongoing contraceptive method is an important next step. EC is a one-time safety net — it is not a sustainable substitute for regular contraception.
Resuming or starting contraception after EC:
After LNG EC pills: Regular contraception — including combined pills, progestogen-only pills, or other methods — can be started or resumed immediately.
After UPA: Wait until the 6th day after taking UPA before starting or resuming any progestogen-containing method (including combined hormonal pills). This is because UPA and progestogen interact and may reduce each other's effectiveness. Use condoms during this period.
After copper IUD insertion: The IUD itself provides immediate, ongoing contraception. No additional method is needed.
If you find that you need emergency contraception frequently, or if you are not currently using regular contraception and would like to, a conversation with a gynaecologist is the most useful step. There are many effective, comfortable, and suitable options — finding the right one for you is a personal decision made with good medical guidance.
A Closing Word
Emergency contraception is a medically safe, legally available, and factually important part of women's health. It exists because life is not always predictable — contraception fails, situations arise, and every woman deserves access to information and options without judgment.
If you have already used EC and are simply looking for reassurance — most women who take it experience no significant side effects, and their next period arrives close to schedule. Give yourself grace.
If you are thinking about what comes next in terms of ongoing contraception, that is an important and very normal conversation to have with a gynaecologist. There is no single right answer — the right contraceptive for you depends on your health, your circumstances, and your preferences. That conversation is worth having.
Dr. Varshali Mali is an Obstetrician and Gynecologist practicing in Pune. She completed her MBBS from Dr. D. Y. Patil Medical College, Pune, and her DNB in Obstetrics & Gynecology from Jehangir Hospital, Pune. She also holds a Diploma in Gynecological Endoscopy from the University of Schleswig - Holstein, Germany.
She currently practices at her clinic located in Life Republic Township, near Marunji, serving women and families from Hinjewadi, Wakad, Punawale, and surrounding areas. Her approach is rooted in listening carefully, explaining gently, and guiding patients with sincerity and care.
Registered Medical Practitioner, Maharashtra Medical Council
Reg. No. 2006113374
Reg. No. 2006113374
Disclaimer
This article is for general awareness only. It should not be considered as a medical advice and should not replace a consultation with a doctor. Every case is unique; please seek professional medical guidance for your personal condition.
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