The Contraceptive Implant: Everything You Need to Know About the ‘Fit and Forget’ Birth Control
When it comes to choosing birth control, the options can feel overwhelming. From daily pills to barrier methods, finding the right fit for your lifestyle is a personal journey. However, one method has surged in popularity due to its “fit and forget” nature: the contraceptive implant. This small, flexible plastic rod is a powerhouse of hormonal contraception, offering peace of mind for years at a time.
Whether you are looking to streamline your morning routine or seeking a highly reliable method of pregnancy prevention, the implant is a top-tier contender. In this guide, we will explore how it works, what to expect during the insertion process, and why it is considered a leading form of long-acting reversible contraception (LARC).
What exactly is the contraceptive implant?
The contraceptive implant is a small, subdermal rod about the size of a matchstick. In the UK, the most common brand used is Nexplanon. It is inserted just under the skin of your upper arm by a trained healthcare professional.
Once in place, it works as a progestogen-only method. This means it steadily releases the hormone progestogen into your bloodstream to prevent pregnancy. It does not contain any oestrogen, making it an excellent alternative for those who cannot utilise combined hormonal methods due to health reasons, such as migraines with aura or high blood pressure.
How it prevents pregnancy
The implant protects you in three distinct ways:
- Stopping Ovulation: It primarily works by preventing your ovaries from releasing an egg each month.
- Thickening Cervical Mucus: It makes the mucus at the entrance of the womb thicker, making it difficult for sperm to pass through.
- Thinning the Womb Lining: It thins the lining of the uterus, making it less likely for a fertilised egg to implant itself.
The Pros and Cons: Is it Right for You?
Every body is unique, and what works for one person might not work for another. It is essential to weigh the benefits against the potential side effects. According to the Family Planning Association, the implant is over 99% effective, which is a significant draw for many.
| Feature | The Pros | The Cons |
|---|---|---|
| Effectiveness | Over 99% effectiveness rate. | Does not protect against STIs. |
| Convenience | Lasts for 3 years; “fit and forget.” | Requires a minor procedure for removal. |
| Menstrual Cycle | Can make periods lighter or stop them entirely. | May cause irregular bleeding or spotting. |
| Fertility | Fertility returns to normal immediately after removal. | Initial insertion site may be tender or bruised. |
The Procedure: Insertion and Removal
Many people feel nervous about the idea of a subdermal device, but the process is straightforward and typically takes less than five minutes. Your clinician will first apply a local anaesthetic to numb the area on the inside of your upper arm, ensuring you feel no pain during the insertion.
A special applicator is used to place the Nexplanon rod under the skin. You won’t need stitches, just a small adhesive dressing and a bandage to keep the area clean. You can find detailed clinical guidelines on the procedure at the NICE website.
The removal is equally simple. A tiny incision is made after numbing the area, and the rod is gently pulled out. If you wish to continue with the method, a new one can be placed in the same spot immediately. Many users find the ease of this process a major advantage compared to other birth control options.
Managing Side Effects and Your Menstrual Cycle
The most common conversation regarding the contraceptive implant involves the menstrual cycle. Because the implant is a constant low dose of hormones, your periods will likely change. According to research published in The Lancet, about 20% of users will have no bleeding at all, while others may experience irregular bleeding.
Other potential side effects can include:
- Headaches or migraines.
- Breast tenderness.
- Mood changes.
- Acne flare-ups.
It is often recommended to wait at least three to six months to allow your body to settle into the new hormonal balance. If you find the changes difficult to manage, organisations like Brook provide excellent support for young people navigating these choices.
Frequently Asked Questions (FAQs)
Can the implant move around my body?
While it is rare, the implant can sometimes move slightly from its original insertion site. However, it cannot travel to other parts of your body like your heart or lungs. If you cannot feel your implant under your skin, you should contact your doctor or a sexual health clinic for a check-up.
Will the implant make me gain weight?
Weight gain is often cited as a concern, but clinical studies, such as those reviewed by the Mayo Clinic, have found no definitive evidence that the implant directly causes weight gain for the majority of users.
How soon does it start working?
If the implant is fitted during the first five days of your menstrual cycle, you are protected against pregnancy immediately. If it is fitted at any other time, you will need to use additional pregnancy prevention, such as condoms, for the first seven days. You can find more timing advice at Contraception Choice.
Is it safe to use while breastfeeding?
Yes, the contraceptive implant is safe to use while breastfeeding. It does not affect the milk supply or the health of the baby. The Royal College of Obstetricians and Gynaecologists (RCOG) suggests it can be inserted immediately after birth.
Can any medications interfere with the implant?
Certain enzyme-inducing medications, such as some treatments for epilepsy, HIV, or St John’s Wort, can reduce the effectiveness of the implant. Always disclose your medications to your GP or pharmacist. Detailed drug interaction lists are available via The BMJ or Patient.info.
Does the implant protect against STIs?
No. While the implant is an elite form of pregnancy prevention, it offers zero protection against sexually transmitted infections (STIs). To ensure full protection, you should always combine its use with condoms, as highlighted by Cleveland Clinic and WebMD.
