Who Can Use the Contraceptive Implant?

Can you get pregnant with an implant? Yes, but it's rare. The contraceptive implant is more than 99% effective, which means fewer than 1 in 1,000 users become pregnant while it's in place. Like any contraceptive method, it isn't 100% foolproof, but failures usually happen for a specific reason rather than by chance.

If you've been searching for answers about contraception in arm implant options, you're probably looking for reassurance rather than statistics. Maybe you've recently had the implant fitted. Maybe you've noticed a change in your bleeding pattern. Or perhaps you're deciding if this anti pregnancy implant in UK clinics offer is right for you.

Let's clear up the facts, explain when the implant starts working, who can safely use it, and when it's worth speaking to a doctor.

How Long Does It Take for the Implant to Work?

Timing matters.

The implant doesn't always start working the moment it's inserted. The answer depends on when it's fitted.

Inserted During the First Five Days of Your Period

If the implant is inserted within the first five days of your menstrual cycle, you're protected against pregnancy immediately.

You don't need to use condoms or another contraceptive method after leaving your appointment because the implant begins working straight away.

Inserted at Any Other Time

This is where confusion often starts.

If you're asking how long does it take for the implant to work, the answer is seven days when it's fitted outside the first five days of your cycle.

During that first week, you'll need to use condoms or avoid sex to give the implant enough time to become fully effective.

It's an easy detail to miss, but it makes a real difference. Assuming you're protected too soon can leave you at risk of an unintended pregnancy.

After Birth, Miscarriage or Abortion

The timing changes again after pregnancy.

If the implant is fitted up to day 21 after giving birth, you'll be protected immediately. After day 21, you'll usually need additional contraception for seven days unless your doctor advises otherwise.

Following a miscarriage or abortion, immediate protection is possible if the implant is inserted within the first five days. If it's fitted later than that, you'll usually need backup contraception for seven days.

The exact timing depends on your circumstances, so it's always worth discussing this during your appointment instead of relying on general advice online.

If you're considering the implant and would like to know what happens during the procedure, read our guide on How the Contraceptive Implant Is Fitted.

Also Read - What Is Family Planning

Can You Still Get Pregnant With the Implant In?

The Implant Wasn't Inserted Correctly

The implant needs to sit just beneath the skin of your upper arm. If it isn't inserted properly, it may not release the hormone as intended.

This is uncommon, but it's one reason why the fitting should always be carried out by a trained healthcare professional.

It's Past Its Replacement Date

The implant doesn't last forever.

Once it reaches the end of its approved lifespan, its effectiveness falls. If you've delayed replacing it, you could become pregnant even though the implant is still in your arm.

If you're unsure when yours was fitted, it's worth checking your records or booking a review.

Certain Medicines Can Reduce Its Effectiveness

Some medicines speed up the way your body processes hormones. When that happens, the implant may not work as well.

This includes certain medicines used to treat:

• Epilepsy

• Tuberculosis (TB)

• HIV

Some herbal remedies can also interfere with the implant. St John's Wort is the best-known example.

Always tell your doctor or pharmacist that you have a contraceptive implant before starting new medication.

The Implant Has Moved

People often worry about the implant travelling around the body.

In reality, significant movement is rare. Small changes in position can happen, but they don't usually affect how well the implant works.

If you can't feel the implant or think it has moved significantly, arrange an appointment rather than trying to work it out yourself.

Pregnancy with the implant in place is unusual. That doesn't mean you should ignore symptoms that concern you. If your periods change suddenly, you develop pregnancy symptoms, or you think something isn't right, take a pregnancy test and speak to a doctor.

Who Can Use the Contraceptive Implant?

The implant suits a wide range of women, but it isn't right for everyone.

That's why your appointment starts with a conversation rather than a procedure.

Doctor Lisa will ask about your health, medications, previous pregnancies, and what you want from your contraception before recommending the implant.

Health Conditions That May Rule It Out

The implant may not be suitable if you have:

• A history of breast cancer.

• Certain liver conditions, including cirrhosis.

• A history of serious cardiovascular disease or stroke.

• Unexplained vaginal bleeding that hasn't been investigated.

Having one of these conditions doesn't automatically mean the implant isn't an option, but it does mean you should have a detailed discussion before making a decision.

Pregnancy, Birth and Breastfeeding

The implant can be fitted after giving birth and is considered safe during breastfeeding.

If it's inserted within 21 days of giving birth, you'll usually be protected immediately. If it's fitted later, you'll normally need additional contraception for the first seven days.

Your doctor will explain exactly when protection begins based on your circumstances.

After a Miscarriage or Abortion

The implant can also be fitted after a miscarriage or abortion.

If it's inserted within five days, you'll usually have immediate protection. If it's fitted later, you'll need to use condoms or another backup method for seven days.

The timing is straightforward, but it still helps to discuss it during your appointment rather than relying on general advice.

Medicines That Can Stop It Working

Medication is easy to overlook.

Some medicines reduce the effectiveness of hormonal contraception, including the implant.

These include medicines used for:

• Epilepsy

• Tuberculosis

• HIV

The antifungal medicine griseofulvin and the herbal remedy St John's Wort can also interfere with the implant.

If you're prescribed new medication, mention that you have the implant before starting treatment.

If you'd like to understand the possible side effects before choosing this method, read our guide to Contraceptive Implant Side Effects.

What Happens If You Get Pregnant While the Implant Is In?

Finding out you might be pregnant with the implant in place can be unsettling. The good news is that it happens very rarely. If it does happen, the priority is finding out what's going on as early as possible.

The first challenge is recognising the signs.

The implant often changes your bleeding pattern. Your periods may become lighter, irregular, or stop altogether. That means a missed period isn't always a reliable clue. Instead, pay attention to symptoms such as:

• Nausea.

• Breast tenderness.

• Unusual tiredness.

• A positive pregnancy test.

• Persistent lower abdominal pain.

If you think you could be pregnant, don't assume the implant has stopped working because of something you've done. Take a pregnancy test and arrange an appointment with a doctor.

If pregnancy is confirmed, your doctor will also want to rule out an ectopic pregnancy. This is a pregnancy that develops outside the uterus, most commonly in the fallopian tube. It is uncommon, but it needs prompt medical assessment because it can become serious if left untreated.

If the pregnancy is inside the uterus, the implant is usually removed. Your doctor will explain the next steps and discuss your options with you.

Pregnancy while using a contraceptive implant does not automatically increase your risk of miscarriage. The concern is making sure the pregnancy is in the right place and that you receive the appropriate care as early as possible.

Is There a Contraceptive Implant Age Limit?

There isn't a single age that determines whether you can or cannot have the implant.

The decision depends on your overall health, medical history, and contraceptive needs rather than the number of birthdays you've had.

The implant is suitable for teenagers, adults, and women approaching menopause, provided there are no medical reasons that make another contraceptive method more appropriate.

If you're unsure whether your age affects your options, a consultation will usually provide a clearer answer than an online search.

Implant vs the Pill: Which Is Safer?

The pill and the implant are both effective methods of contraception, but they work differently.

The biggest difference is that the implant doesn't rely on memory.

With the pill, protection depends on taking it correctly every day. Missed tablets, sickness, or diarrhoea can reduce its effectiveness.

The implant keeps working once it's been fitted. There's nothing to remember, and everyday life doesn't affect how well it protects you.

That doesn't automatically make it the better choice.

If you'd rather have a contraceptive method you can stop yourself without booking an appointment, the pill may suit you better. If remembering medication has never been your strength, the implant removes that responsibility altogether.

The right choice comes down to your health, your lifestyle, and what you want from your contraception.

How Is the Contraceptive Implant Inserted?

The contraceptive bar implant is fitted during a simple outpatient appointment.

A local anaesthetic is used to numb a small area on the inside of your upper arm before the implant is placed just beneath the skin using a specialised applicator.

The procedure usually takes only a few minutes, and you can normally return home shortly afterwards with a small dressing over the area.

If you'd like a step-by-step explanation of the procedure, read our complete guide to Contraceptive Implant Fitting.

Read Also - How do Implants Work

Contraceptive Implant Side Effects

Every contraceptive method has potential side effects, and the implant is no different.

The change you'll notice most often is your bleeding pattern. Your periods may become lighter, less frequent, irregular, or stop altogether.

Some women also experience headaches, acne, breast tenderness, or mood changes, particularly during the first few months after fitting.

Side effects don't affect everyone in the same way, which is why discussing your medical history before choosing contraception is so important.

Frequently Asked Questions

Who can use a contraceptive implant?

The implant is suitable for many women, including teenagers, adults, women who are breastfeeding, and those looking for long-term contraception. Your doctor will check your medical history and medications before recommending it.

Can you have a miscarriage while on a birth control implant?

Yes. Pregnancy can still end in miscarriage even if it occurs while the implant is in place. The first priority is confirming the pregnancy and ruling out an ectopic pregnancy, as this requires prompt medical assessment.

Who is the implant not suitable for?

The implant may not be suitable if you have certain liver conditions, a history of breast cancer, unexplained vaginal bleeding, or specific cardiovascular conditions. Some medicines can also reduce how well it works.

What is safer, the pill or the implant?

Both methods are safe and effective when used correctly. The implant has a lower failure rate because it doesn't depend on remembering a daily tablet. The pill may still be the better choice if it suits your health and lifestyle more closely.

Looking for Personalised Advice?

Reading online can answer general questions, but it can't tell you which contraceptive method is right for you.

If you're thinking about getting the contraceptive implant, have concerns about your current implant, or simply want clear advice without feeling rushed, Dr Lisa offers private consultations from her Harley Street clinic.

You'll have time to ask questions, understand your options, and make a decision that fits your health and your plans for the future.