Can You Eat After Taking Plan B? Everything You Need to Know About Emergency Contraception
What is Plan B and how does it work. How effective is emergency contraception. Are there any side effects of taking Plan B. When should you take emergency contraception pills. Where can you get Plan B and other emergency contraceptives. How does Plan B affect your menstrual cycle. What are the alternatives to Plan B for emergency contraception.
Understanding Emergency Contraception: What Is Plan B?
Emergency contraception, often referred to as the “morning-after pill,” serves as a crucial safety net for individuals who have had unprotected sexual intercourse or experienced contraceptive failure. Plan B One-Step, also known as My Way, is a widely used form of emergency contraception that contains levonorgestrel, a synthetic hormone.
How does Plan B work? The medication delivers a concentrated dose of hormones that can prevent pregnancy by:
- Delaying or inhibiting ovulation
- Preventing fertilization of an egg
- Potentially hindering implantation of a fertilized egg
It’s important to note that emergency contraception does not harm an existing pregnancy.

Timing Is Crucial: When to Take Emergency Contraception
For optimal effectiveness, how soon should you take Plan B after unprotected sex? The general guideline is to take emergency contraception as soon as possible, ideally within 72 hours of unprotected intercourse. However, it can still be effective for up to 120 hours (5 days) after the event.
Is there a difference in effectiveness based on when you take it? Yes, the sooner you take Plan B, the more effective it is likely to be. My Way (Plan B) becomes less effective when used 3-5 days after unprotected sex, while another emergency contraceptive called Ella maintains its effectiveness throughout the 5-day window.
Effectiveness and Limitations of Emergency Contraception
How effective is Plan B in preventing pregnancy? Emergency contraception pills reduce the risk of pregnancy by approximately 75%. To put this into perspective:
- Out of 100 women who have unprotected intercourse mid-cycle, about 8 would typically become pregnant
- With the use of emergency contraception pills, only 2 out of 100 would become pregnant
However, it’s crucial to understand that certain factors can affect the effectiveness of emergency contraception:

Body Weight and BMI Considerations
Does body weight impact the effectiveness of Plan B? Yes, emergency contraception can be less effective for individuals with higher body weight or BMI:
- My Way (Plan B) retains its effectiveness up to a BMI of 30
- Ella, another emergency contraceptive, is effective up to a BMI of 35
For those with higher BMIs, consulting with a healthcare provider about alternative options is advisable.
Timing of Ovulation
Does the effectiveness of Plan B change depending on your menstrual cycle? Yes, My Way becomes less effective when unprotected sex occurs closer to the time of ovulation. In contrast, Ella maintains better effectiveness closer to ovulation.
Potential Side Effects and Safety Considerations
What are the common side effects of taking Plan B? The most frequently reported side effect is nausea, which may or may not be accompanied by vomiting. To mitigate this:
- Take the pill with food to help reduce nausea
- Consider taking over-the-counter or prescription anti-nausea medication about 30 minutes before taking Plan B
Is Plan B safe to use? In 1997, the Food and Drug Administration (FDA) reviewed the evidence and concluded that emergency contraception pills are safe and effective. Subsequently, in 2006, the FDA approved the over-the-counter sale of Plan B/My Way, further affirming its safety profile.

Can Plan B harm an existing pregnancy? If you happen to be already pregnant when taking emergency contraception, studies have shown that the hormones in these pills do not affect the developing fetus.
Accessing Emergency Contraception: Where to Get Plan B
Where can you obtain Plan B or other emergency contraceptives? Availability may vary depending on your location and circumstances:
- Over-the-counter at pharmacies (e.g., CVS, Walgreens) without a prescription
- University health centers (often free for students)
- Healthcare providers’ offices
- Family planning clinics
For example, at Yale University, emergency contraception pills are available free of charge to all Yale students and Yale Health members when acquired at the Yale Health Center.
Prescription vs. Over-the-Counter Options
Are all emergency contraceptives available without a prescription? While My Way (Plan B) is available over-the-counter, some emergency contraceptives, such as Ella (ulipristal), require a prescription from a healthcare provider.

Taking Plan B: What to Expect
How do you take Plan B? The treatment typically consists of a single pill. If you’re prone to nausea, you may want to:
- Take an anti-nausea medication first (if recommended by your provider)
- Wait 30 minutes to an hour
- Take the emergency contraception pill with food
How might Plan B affect your menstrual cycle? After taking Plan B, you may experience changes in your menstrual cycle:
- Your period might start a few days earlier or later than expected
- If your period doesn’t start within a week of when expected, it’s advisable to take a pregnancy test
- If you haven’t started your period within 3 weeks of using emergency contraception, consult with a healthcare provider
When should you take a pregnancy test after using Plan B? If you feel pregnant or haven’t had your period within 3 weeks of taking emergency contraception, it’s recommended to take a pregnancy test or seek evaluation from a healthcare provider.
Limitations and Alternatives to Plan B
Are there situations where Plan B might not be the best option? Emergency contraception pills might not be suitable if:
- You have a history of allergy to the medication
- You are significantly overweight (BMI over 30-35)
- The unprotected sex occurred more than 120 hours earlier
What are the alternatives to Plan B for emergency contraception? One highly effective alternative is the Paragard copper-containing IUD:
- If inserted within 5 days (120 hours) of unprotected sex, it provides over 99% effective emergency contraception
- It can also serve as ongoing, long-term contraception
Is emergency contraception a suitable primary method of birth control? Emergency contraception should not be relied upon as a primary method of contraception. It is less effective than methods designed for continuous protection from pregnancy. Healthcare providers may recommend discussing more reliable contraceptive options if emergency contraception is used frequently.

Eating After Taking Plan B: What You Need to Know
Can you eat after taking Plan B? Yes, you can eat normally after taking Plan B. In fact, taking the pill with food is often recommended to help reduce the likelihood of nausea, which is a common side effect.
Are there any dietary restrictions after taking Plan B? There are no specific dietary restrictions after taking Plan B. However, it’s generally advisable to:
- Stay hydrated by drinking plenty of water
- Avoid excessive alcohol consumption, as it may increase the risk of nausea
- Maintain a balanced diet to support your overall health
Does eating affect the effectiveness of Plan B? Eating does not significantly impact the effectiveness of Plan B. The medication is designed to be absorbed quickly by your body, regardless of food intake. However, if you vomit within 2 hours of taking the pill, you should contact a healthcare provider, as you may need to take another dose.
Nausea Management and Eating
How can you manage nausea associated with Plan B through diet? If you’re prone to nausea, consider the following dietary strategies:
- Eat small, frequent meals throughout the day
- Choose bland, easily digestible foods
- Avoid spicy, greasy, or heavy foods that may exacerbate nausea
- Sip on clear fluids or ginger tea to help settle your stomach
Remember, while these strategies may help, everyone’s body reacts differently. If nausea persists or becomes severe, consult with a healthcare provider.

Long-Term Considerations and Follow-Up Care
What should you do after taking Plan B? After using emergency contraception, it’s important to:
- Monitor your menstrual cycle for any changes
- Take a pregnancy test if your period is late or you experience pregnancy symptoms
- Consider starting a regular, more reliable form of contraception
- Schedule a follow-up appointment with your healthcare provider if needed
How soon can you resume regular contraception after taking Plan B? You can start or resume regular hormonal contraception immediately after taking Plan B. However, it’s crucial to use a barrier method (like condoms) or abstain from sexual intercourse until your next period to ensure you’re fully protected.
Is it necessary to inform future healthcare providers about using Plan B? While it’s not always necessary, it can be helpful to inform your healthcare providers about any use of emergency contraception, especially if you experience ongoing menstrual irregularities or other concerns.

Emotional and Psychological Aspects
How might taking Plan B affect you emotionally? Using emergency contraception can be a stressful experience. It’s normal to feel a range of emotions, including relief, anxiety, or uncertainty. If you’re struggling with these feelings, consider:
- Talking to a trusted friend or family member
- Seeking support from a counselor or mental health professional
- Discussing your feelings and concerns with your healthcare provider
Remember, taking responsible steps to prevent unintended pregnancy is a positive action, and there’s no need for shame or guilt associated with using emergency contraception.
Educating and Empowering: Spreading Awareness about Emergency Contraception
How can we improve access to and understanding of emergency contraception? Educating individuals about emergency contraception is crucial for promoting reproductive health and empowering people to make informed decisions. Some ways to spread awareness include:
- Incorporating comprehensive sex education in schools
- Providing accurate information through healthcare providers and pharmacists
- Utilizing social media and online platforms to share factual, easy-to-understand information
- Advocating for policies that ensure affordable and accessible emergency contraception
By increasing knowledge about emergency contraception, we can help reduce unintended pregnancies and support individuals in taking control of their reproductive health.

What role do healthcare providers play in emergency contraception education? Healthcare providers are essential in:
- Offering accurate information about emergency contraception options
- Helping patients choose the most appropriate method based on individual circumstances
- Addressing concerns and misconceptions about emergency contraception
- Providing follow-up care and discussing long-term contraceptive options
Open communication between patients and healthcare providers is key to ensuring that individuals have the information and resources they need to make informed decisions about their reproductive health.
Emergency Contraception – “Morning After Pill”
Emergency contraception provides an important safety net when you have sexual intercourse and no contraception is used or the contraception used is compromised (missed birth control pills, missed Depo injection, condom slips/breaks, etc.).
Emergency contraception pills are hormone-containing pills taken to give you a burst of hormonal contraception, which will likely prevent ovulation, fertilization, and/or implantation. Emergency contraception will not harm an already existing pregnancy.
You should take the emergency contraception pill as soon as possible; up to 120 hours (5 days) after unprotected sex.
Emergency contraception pills are free to all Yale students and Yale Health members when acquired at the Yale Health Center.
Emergency Contraception Pills
- My Way (Plan B – levonorgestrel) is available over-the-counter, without a prescription.
- Ella (ulipristal) is available by prescription from a provider in Student Health, OB/GYN or Acute Care.

(See Emergency Contraception Comparison Chart and/or contact the Yale Health Ob/Gyn Department if you’re not sure which option is best for you.)
Where to Get Emergency Contraception at the Yale Health Center
(free for all Yale students, and all Yale Health members)
- Yale Health Pharmacy (either going to the Pharmacy directly, or after consulting with a provider in one of our clinical departments)
- Acute Care
Other Locations (purchase price varies)
- Commercial pharmacies, like CVS, Walgreens, etc.
Effectiveness
Emergency contraception pills reduce the risk of pregnancy by approximately 75%. In other words, out of 100 women who have unprotected intercourse mid-cycle, approximately 8 would become pregnant. With use of emergency contraception pills, only 2 of the 100 would become pregnant.
- My Way becomes less effective if used 3-5 days after unprotected sex, while Ella’s effectiveness stays the same for the full 5 days.

- Both medications are less effective for obese women. My Way retains its effectiveness up to a BMI of 30. Ella is effective up to a BMI of 35.
- My Way is less effective when unprotected sex occurs closer to the time of ovulation. Ella is more effective than My Way closer to ovulation.
Side Effects of Emergency Contraception Pills
The most common side effect is nausea, with or without vomiting. There are ways to decrease this if you become nauseous easily. Take the pill with food. You may elect to take prescription or over-the-counter anti-nausea medications about 30 minutes prior to the first dose of an emergency contraception pill.
Safety
In 1997, the Food and Drug Administration reviewed the evidence and concluded that emergency contraception pills are safe and effective. In 2006, the FDA approved the sale of Plan B/My Way over the counter (OTC).
If you happen to already be pregnant and take emergency contraception, the hormones in emergency contraception pills have been shown not to affect the baby.
Important Note: Emergency contraception should not be used as your primary method of birth control. It is much less effective than methods designed for continuous protection from pregnancy. If you pick up 4 or more emergency contraception pill doses in a year, the Yale Health Pharmacy will notify the Ob/Gyn Department, so they can reach out to discuss better options for preventing pregnancy.
Taking the Medication
A Yale Health nurse or pharmacist will give you a dose of My Way, or you may have a provider prescribe Ella for you.
The treatment consists of one pill. If your provider recommends an antinausea medication, take it first. Wait 30 minutes to one hour and then take the emergency contraception pill. It is helpful to take the pill with food, and not on an empty stomach.
Your period may start a few days earlier or a few days later than expected. If it does not start within a week of when expected, you should come in for a pregnancy test and/or evaluation.![]()
If you have not started your period within 3 weeks from the date of using emergency contraception, you should come in for a pregnancy test and/or evaluation. If you feel pregnant sooner, you should do a pregnancy test at that time.
Reasons Not to Take Emergency Contraception
Emergency contraception pills might not be a good option for you if you have a history of allergy to the medication, if you are significantly overweight, or if the unprotected sex occurred more than 120 hours earlier. There are no known medical conditions for which emergency contraception is unsafe.
Remember, even if it’s been more than 120 hours, and the episode occurred at mid-cycle, the chances of becoming pregnant are still low (less than 10%).
Additional Option
The Paragard copper-containing IUD, if inserted within 5 days (120 hours), provides over 99% effective emergency contraception, plus ongoing effective contraception for up to 10-12 years.
It is inserted with a minor office procedure in the Ob/Gyn Department. You can make an appointment via MyChart or by calling 203-432-0222.
Additional Concerns
If barrier contraception (condom) wasn’t used, or if it failed, you should consider the chance that you’ve been exposed to a sexually-transmitted infection (STI). You should discuss this further with a nurse or provider.
If the sex was unprotected because it was nonconsensual (for example, sexual assault or date rape), please talk to one of our caregivers to learn about the resources available to you at Yale, including The Share Center.
Plan B FAQs | Plan B One-Step®
We made it easy and put them all in one place.
Plan B One‑Step sometimes referred to as the “morning after pill,” is emergency contraception pill that helps prevent pregnancy before it starts when taken within 72 hours after unprotected sex.

Plan B is a backup method of preventing pregnancy and should not be used as regular birth control. Use as directed.
Plan B can significantly decrease the chance that you get pregnant. When used as directed, about 7 out of every 8 women who could have gotten pregnant did not become pregnant after taking Plan B.
Birth control (or contraception) is any method, medicine, or device used to prevent a pregnancy before it starts. There are many different types of birth control. Some work better than others at preventing pregnancy and no method is 100% effective. But your chances of getting pregnant are lower if you use a more effective method.
Primary methods of birth control are meant to be used before sex to prevent a pregnancy.
These methods can range from things like condoms (which can be found right at the store without a prescription) to birth control pills or IUDs (which need to be prescribed by your doctor).Emergency contraception (like Plan B) is a form of birth control that is meant to be used if your primary method failed (like a condom broke or you missed pills) or you forgot to use primary birth control. Plan B is used to help prevent pregnancy after sex and must be taken within 72-hours after unprotected sex or if your primary birth control failed. The sooner you take it, the better it will work. It is not meant to be used as a regular form of birth control because it is not as effective.
If you find that you are using Plan B frequently, talk to your doctor about finding a primary birth control method (a “plan A” method) that is right for you.
org/Question”>Plan B helps prevent pregnancy by temporarily delaying ovulation. That is, it works by stopping the release of an egg from the ovary, so there’s no egg to meet the sperm. No egg, no fertilization, no pregnancy.
Plan B will not impact your ability to get pregnant in the future.
Plan B is not an abortion pill and it will not be effective if a woman is already pregnant. Plan B will not harm an existing pregnancy.
Yes! Plan B does not impact the effectiveness of any regular birth control methods, so you can continue your regular birth control right away—or start one, if you don’t have a regular method.

We continue to hold the same belief as the U.S. Food and Drug Administration (FDA), which states that there are no safety concerns that preclude the use of levonorgestrel emergency contraceptives in women generally, and continue to believe that all women, regardless of how much they weigh, can use Plan B to prevent unintended pregnancy following unprotected sex or contraceptive failure. The most important factor affecting how well Plan B works is how quickly it is taken. When Plan B emergency contraception is taken as directed, within 72 hours after unprotected sex or birth control failure, it can significantly decrease the chance that a woman will get pregnant. In fact, the earlier the product is taken after unprotected intercourse, the better it works.
Emergency contraception is not meant to be used as a regular form of birth control because it is not as effective. If you find that you are using Plan B frequently, talk to your doctor about finding a primary birth control method that is right for you.
Plan B, sometimes referred to as the “morning after pill,” is emergency contraception you can take after:
- You didn’t use any form of birth control or had unprotected sex
- There was an issue with your regular birth control method (eg, the condom broke or slipped)
- You missed a dose (or more) of your regular birth control pill
Use the countdown calculator
You should take Plan B up to 72 hours (3 days) after unprotected sex. The sooner it’s taken after unprotected sex, the better it works.
Plan B One‑Step is one pill that you place in your mouth and swallow, preferably with water.
You can take Plan B with or without food. The most important thing to know about taking Plan B is that it must be taken within 72 hours (3 days) after unprotected sex to help prevent pregnancy before it starts. The sooner you take it, the better it works.Yes, you can use Plan B when you are breastfeeding. In general, no harmful effects of progestin-only pills, like Plan B, have been found on breastfeeding performance or on the health, growth, or development of the infant. However, random cases of decreased (less) milk production in mothers have been reported.
Plan B emergency contraception should not be used as a regular method of birth control. However, if you have already used Plan B, it can be safely used again after another instance of unprotected sex or birth control failure.
It will not affect a woman’s future fertility.Plan B doesn’t provide long-term protection against future pregnancy—it works to help prevent pregnancy after only one act of unprotected sex or birth control failure.
Plan B only stays in your body for a short amount of time. It doesn᾿t provide long-term protection against future pregnancy; when taken as directed it works to help prevent pregnancy after only one incident of unprotected sex. If you are sexually active, even occasionally, see your healthcare professional or visit a family planning center/clinic to find a regular method of birth control that suits you.
Find a Family Planning Clinic
Do not take Plan B:
- If you’re already pregnant, because it won’t work
- If you’re allergic to levonorgestrel or any of the ingredients in Plan B
- In place of regular birth control
- If you’re male
This product is not intended for use in postmenopausal women.

Use before the first menstrual period is not appropriate.
When used as directed, Plan B is safe and effective.
Some women may experience side effects, including:
- a period that’s lighter, heavier, early, or late
- nausea
- lower abdominal cramps
- tiredness
- headache
- dizziness
- breast tenderness
- vomiting
Some women taking Plan B may have changes in their period, such as spotting or bleeding before their next period. If your period is more than a week late, it’s possible you might be pregnant. Get a pregnancy test and follow up with your healthcare professional.
If you vomit within 2 hours of taking Plan B, talk to your healthcare professional to find out if you should repeat the dose.
org/Question”>
Examples of drugs or herbal products that could decrease the effectiveness of Plan B include barbiturates, bosentan, carbamazepine, felbamate, griseofulvin, oxcarbazepine, phenytoin, rifampin, St. John᾿s wort, topiramate, and certain HIV/AIDS medications.
Contact your healthcare professional before taking Plan B if you have any concerns or are taking any of these medications.
No. You can find Plan B yourself in the family planning aisle—no prescription or ID needed. There’s also no age requirement—anyone can buy it.
No. Plan B is available for purchase in every state—no prescription or ID needed. There’s also no age requirement. Anyone can buy it.
org/Question”>Plan B has a shelf life of four years.
For the exact month and year that the Plan B is set to expire, you can refer to the information printed on the side of the box. Store the product at room temperature between 68‑ and 77‑degrees Fahrenheit.You can find Plan B yourself in the family planning aisle of all major retailers, including CVS, Walgreens, Rite Aid, Target, and Walmart. It’s also available at smaller pharmacies and some food stores around the country.
Find a store
Prefer to order Plan B online? You can buy it directly from our site.
Remember, Plan B must be taken within 72 hours (3 days) after unprotected sex. If you need it right away, you can get it right off the shelf at the stores above.
Yes. Plan B is available online here.
Remember, Plan B must be taken within 72 hours (3 days) after unprotected sex.
If you need it right away, you can get it right off the shelf at local retailers. Wondering where Plan B is stocked in your area? Find a store near you.There are two ways to save on Plan B: a coupon or a rebate.
How to save
Offers cannot be combined.
Not sure how to bring up the topic of taking Plan B? Try the tips below.
- Start with the facts. This site is full of information to help you have a conversation about Plan B—whether it’s with a friend, family member, or partner.
- Plan ahead. Consider making a list of what you want to discuss and try practicing the conversation out loud. Think about potential responses to any concerns your friend/family member/partner might have.

- Find the right time and place. Make sure you have a private place to discuss Plan B—a place where you won’t get interrupted or feel rushed.
- Be respectful. Respect what the other person is thinking and feeling. Be open to other opinions, but remember: it’s your body and your choice.
- Practice safe sex. Discuss future contraception. Safe sex is important, even if you’re in a monogamous relationship (remember: neither birth control pills nor emergency contraception like Plan B protect against STDs or HIV/AIDS).
You can find downloadable PDFs, fact sheets, and more from Plan B on our resources page.
Check out the websites below to stay informed on what’s happening in women’s healthcare, and to learn more about birth control options and emergency contraception.
Planned Parenthood
FDA
American Society for Emergency Contraception
Mayo Clinic
Henry J.
Kaiser Family FoundationNational Family Planning & Reproductive Health Association
Find a Family Planning Clinic
Foundation Consumer Healthcare is not responsible for the content on the websites listed above and disclaims any liability for the content of any page or site listed above.
Although the information above may be useful, it shouldn’t replace the advice of your healthcare professional. For questions about birth control and other women’s health issues, please talk to your healthcare professional.
First and foremost, Plan B is an emergency contraceptive—it is not an abortion pill, and it does not hurt existing pregnancies. Plan B and other emergency contraception brands have been approved since 2013 for purchase without a prescription, ID or age restriction. Plan B can be found at all major retailers across the country, in every US state, in the family planning aisle.
The availability and access of Plan B is governed nationally by the U.S. Food and Drug Administration (FDA). Plan B is not in any way connected to Roe v Wade. Plan B will continue to be made available at all major retailers without a prescription, ID or age restriction regardless of any rulings on abortion restrictions.
Foundation Consumer Healthcare will continue to advocate that no legal barriers should limit a woman’s access to Plan B emergency contraception.
Use of emergency contraceptives, effectiveness, side effects, long-term use
How do contraceptives work in case something goes wrong? How effective are they? What side effects can occur? Can I use “Plan B” as the main method of contraception?
Emergency contraceptives have been developed to help women avoid abortion after unprotected intercourse, when there is doubt about the effectiveness and correct use of other protection methods, or after sexual assault.
Emergency contraceptive methods
Hormonal preparations
- 1 Tablets containing levonorgestrel
- 2. Tablets containing ulipristal acetate
- 3. Combined oral contraceptives containing ethinyl estradiol and levonorgestrel
The method is effective in 95% of cases. The principle of action of all these funds is to suppress or delay ovulation. The pill is recommended to be taken as soon as possible. Levonorgestrel is effective within 72 hours, other groups of drugs – within 120 hours after sexual intercourse.
If vomiting occurs within 2-3 hours after the tablet, the drug should be repeated. The first two groups of tablets are preferable, as they cause fewer side effects.
The effectiveness of drugs may be reduced by interaction with a number of other drugs.
Copper IUD
The IUD is a small T-shaped device made of plastic and copper.
The spiral changes the chemical composition of the mucus in the cervix, preventing the fertilization of the egg.
The coil must be inserted within 5 days after intercourse. This method is considered the most effective among all means of emergency contraception: pregnancy occurs in only 1% of cases.
The coil can be left as the main method of contraception, but in this case, you should expect more prolonged and heavy menstrual bleeding.
Side effects of emergency contraceptive drugs
In general, drugs do not cause any serious side effects.
In some cases, there may be:
- – Failure of the menstrual cycle (earlier or later than usual)
- – Spotting
- – Nausea and vomiting
- – Fatigue
- – Headache and dizziness
- – Breast sensitivity
- – Abdominal pain
For more severe reactions, it is recommended to make an appointment with a doctor.
Sharp pain in the lower abdomen may indicate an ectopic pregnancy.
Side effects of emergency IUD insertion
Usually IUD insertion does not cause adverse reactions. The method is not recommended for use after sexual abuse due to the high risk of developing genital infections.
Emergency contraception as a last resort
Emergency contraception does not interfere with reproductive function and has no long-term health effects. However, for the main method of protection against unwanted pregnancy, other means should be chosen.
These products were developed as a last resort only and have not been tested for efficacy and safety in regular long-term use.
The material was prepared jointly with the head of the Lahta Woman gynecological service, obstetrician-gynecologist Ekaterina Khivrich
Emergency contraception: “I got pregnant despite the pill”
- 9011 7 Natasha Presky
- BBC Three
Photo credit: BBC THREE/ISTOCK
Warning: This article contains references to sexual assault that may be distressing.
“It never occurred to me that the emergency contraceptive pill would be ineffective.”
Rachel (not her real name) became pregnant after being raped in Canada, where she went after graduation. She was given an emergency contraceptive pill that evening, as part of the medical care she received after the attack.
“When I found out two months later that I was pregnant, it was a complete shock for me,” she recalls. “It never even crossed my mind that this could even happen.”
Rachel, now 34, says she wasn’t told she could still get pregnant after taking emergency contraception: “I don’t remember it being mentioned at the time (the pill. – Rev. .) may not work.”
- What is the most effective method of contraception?
- Women refuse birth control pills. What do they choose instead?
- “Contraceptive pills have made my life a nightmare”
It is estimated that 0.
6-2.6% of women who take emergency contraceptive pills after unprotected sex still get pregnant.
What people know – and what they don’t know – about emergency contraception began to be discussed after the author of the site Refinery29 told how she got pregnant despite taking the pill.
The article went viral and there were calls for greater awareness that emergency contraceptive pills do not protect against unwanted pregnancies.
How do emergency contraceptive pills work?
- Synthetic hormones prevent or delay ovulation (the release of an egg from the ovary)
- If you ovulated before you took the pill and you were fertile during unprotected sex, it will not protect against pregnancy
- This means that the pill emergency contraception may not be effective even if you take them correctly – it all depends on the menstrual cycle
- Ovulation usually occurs in the middle of the cycle (about two weeks before menstruation)
- There are two types of emergency contraceptive pills: levonorgestrel and ulipristal acetate
- Levonorgestrel should be taken within 72 hours (three days) after unprotected sex
- Ulipristala acetate needed take within 120 hours (five days)
Photo credit, BBC THREE/ISTOCK
Some medications can also interfere with the effectiveness of pills, says Dr.
Caroline Cooper, reproductive and sexual health specialist.
“These are the drugs that can affect how your liver processes drugs,” she explains. Among them are some medicines for HIV, epilepsy, and the over-the-counter herbal remedy St. John’s wort, which is sometimes taken to treat mild mood disorders.
Another reason why emergency contraceptive pills may not work is a woman’s weight, explains Dr. Cooper. Women who are overweight have a higher risk of getting pregnant after taking them, she says. “And it’s not even about being overweight,” adds Dr. Cooper.
She says the risk of levonorgestrel failure is much greater if a woman weighs over 70 kg or has a body mass index over 26 (according to the British Health Service, the ideal BMI for most adults is between 18.5 and 24.9).
“Complete surprise”
But how many women know about all this? Although the instructions for emergency contraceptive pills contain information that the drug’s effect is based on delayed ovulation, it, like everything written in fine print, is easy to ignore.
The instruction also does not directly say that the effectiveness of the tablets depends on that day of the menstrual cycle. So why, along with emergency contraceptive pills, are women not given all the information they need?
“I didn’t expect it to not work,” Harriet, 26, told me. During sex, the condom broke, and she resorted to emergency contraception – but she got pregnant anyway, although she took the pill right away and did everything according to the instructions.
Harriet adds that she was told that pills sometimes don’t work, but the only risk factor mentioned was taking the pill too late. Since she did it within 24 hours, she wasn’t worried. About a week later, she found out she was pregnant.
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For Rachel, not knowing that the pill might not work made her situation even more difficult.
“I wouldn’t change anything – my son is 15, it can be very difficult with him, but I wouldn’t want his mother,” she tells me. “But then … I think that such an unexpected pregnancy was very traumatic for me.”
I ask Dr. Cooper if women are always told in a pharmacy or sexual health clinic that their menstrual cycle affects the effectiveness of emergency contraceptive pills.
“I think they should do this,” she says, adding that while pharmacists usually know how emergency contraception works, “if they’re busy, they might not go into all the details.” BBC THREE
Gold Standard
Another available method of emergency contraception is the copper IUD (intrauterine device) inserted within the first five days after unprotected sex.While the pill delays ovulation, the IUD prevents implantation of the fertilized eggs on the uterine mucosa and has an efficiency of 99%.
It is estimated that two out of every 100 women who use ulipristal acetate become pregnant and 0.
6-2.6% of women who use levonorgestrel.
Neither Harriet nor Rachel suggested IUDs as an alternative to pills.
Rebecca Pickerill, a sexual health nurse at Brook’s youth sexual health charity, says their workers always offer IUDs as the “gold standard.”
“We find out when they last had unprotected sex, when they had their last period, cycle length, estimated date of ovulation, which of course is only an approximation – usually ovulation occurs in the middle of the cycle, but obviously not everyone,” she says.
“Then we discuss with them which of the two types of oral contraceptives is best for them … but always emphasize that the IUD is the most effective.”
Dr. Cooper says she has never seen an IUD fail as an emergency contraceptive. “But I have certainly seen women who take emergency contraceptive pills, get pregnant, have an abortion, and then come to me to have a coil inserted, and were furious that no one offered them this option right away,” she adds.
“Men should know it too”
Sexual and reproductive health specialist Dr. Jane Kavanagh thinks emergency contraception should be taught in schools.
- New male contraceptive tested on monkeys
“It is outrageous that every child is not taught about contraception and what to do if they have had sex and there is a risk of pregnancy,” she says. school.”
“I did a small focus group with my teenage daughter’s friends a few years ago, aged 14-15,” she continues. “There were about six girls in the room, and I just asked them, ‘Who knows that an IUD can be used for emergency contraception?” and she was the only one who knew that.”
Harriet adds that it’s not just women who need to be told more about emergency contraception. “I think men should also know more about it,” she says. She says that there were some among her partners who told her that in the morning she could just go to the doctor for pills.




These methods can range from things like condoms (which can be found right at the store without a prescription) to birth control pills or IUDs (which need to be prescribed by your doctor).
You can take Plan B with or without food. The most important thing to know about taking Plan B is that it must be taken within 72 hours (3 days) after unprotected sex to help prevent pregnancy before it starts. The sooner you take it, the better it works.
It will not affect a woman’s future fertility.
For the exact month and year that the Plan B is set to expire, you can refer to the information printed on the side of the box. Store the product at room temperature between 68‑ and 77‑degrees Fahrenheit.
If you need it right away, you can get it right off the shelf at local retailers. Wondering where Plan B is stocked in your area? Find a store near you.
Kaiser Family Foundation