The Birth Control Implant
Set it and forget it — up to 3 years of highly effective protection
The implant is a tiny, flexible rod inserted under the skin of your upper arm. Once it's in, you don't have to think about it — no daily pills, no monthly refills. Here's what you need to know to decide if it's right for you.
Effectiveness
More than 99% — one of the most effective methods available
How long it lasts
Up to 3 years (can be removed any time)
How it works
Releases a low, steady dose of progestin to prevent ovulation
Size
About the size of a matchstick — 4 cm long, 2 mm wide
STD protection
None — use condoms to protect against STDs
Fertility return
Returns quickly after removal — often within weeks
How it works
The implant releases a steady, low dose of progestin (a synthetic hormone) into your bloodstream. This primarily works by preventing ovulation — no egg released means no pregnancy possible. It also thickens cervical mucus, making it harder for sperm to reach an egg. The implant is inserted by a healthcare provider using a small needle under local anesthetic. The procedure takes just a few minutes, and removal is similarly quick when you're ready.
Side effects — what to actually expect
The most important thing to know before getting the implant is that it almost always changes your bleeding pattern. This surprises a lot of people, so it's worth understanding before you decide.
Irregular bleeding is very common
About 1 in 3 people with the implant will have no period at all — which many people love. But another 1 in 3 will have irregular, unpredictable spotting or bleeding, especially in the first 6–12 months. This can mean light spotting for weeks at a time, or periods that come and go without a pattern. It's not dangerous, but it can be frustrating. If irregular bleeding is a dealbreaker for you, the implant may not be the best fit — talk to your provider about alternatives.
Side effects often improve after the first few months as your body adjusts. If side effects are severe or affecting your quality of life, removal is always an option — and your period and fertility return quickly.
Pros and cons
Pros
- Over 99% effective — one of the most reliable methods
- Nothing to remember — no daily pill or monthly refill
- Lasts up to 3 years but can be removed any time
- Fertility returns quickly after removal
- Many people have lighter periods or no period at all
- Hormone-free option exists (copper IUD) if you want to avoid hormones
Cons
- Irregular or unpredictable bleeding is common, especially early on
- Requires a provider visit for insertion and removal
- No protection against STDs
- Can cause mood changes or acne in some people
- Upfront cost can be high without insurance (though often covered)
- You can feel it under your skin — some people find this strange at first
Who it's a good fit for
Good fit if you…
- People who want highly effective, long-term protection without thinking about it daily
- Those who can't or prefer not to take estrogen (the implant is progestin-only)
- People who are okay with unpredictable bleeding or would welcome lighter/no periods
- Anyone who wants something reversible that doesn't require a procedure inside the uterus
May not be ideal if you…
- People who need predictable, regular periods for peace of mind
- Those who are sensitive to progestin-related side effects like mood changes or acne
- Anyone uncomfortable with a small device under their skin
Getting one confidentially
Title X family planning clinics and Planned Parenthood provide implant insertion on a sliding-scale fee and are required to keep your visit confidential. If you're on a parent's insurance, ask the clinic about confidential billing — some clinics can bill in a way that avoids an Explanation of Benefits being sent home. The upfront cost without insurance can be $0–$1,300, but with Medicaid or Title X funding it's often free.
Common questions
Does insertion hurt?
The area is numbed with a local anesthetic first, so the insertion itself usually feels like pressure rather than pain. You may have some bruising or soreness for a few days afterward. Most people say it was less uncomfortable than they expected.
Can I feel it under my skin?
Yes — you can feel a small, firm rod if you press on the area. It's not visible to others, but you'll know it's there. Most people stop noticing it within a few weeks.
What if I want it removed before 3 years?
You can have it removed at any time. Removal is a quick in-office procedure — a small incision, local anesthetic, and the rod is out in minutes. Your fertility returns almost immediately.
Will the irregular bleeding ever settle down?
For many people, yes — bleeding patterns often stabilize after 6–12 months. But for some, unpredictable spotting continues for the full duration. If it's bothering you, talk to your provider — there are sometimes short-term options to help manage it.
How does it compare to the IUD?
Both are long-acting, highly effective, and reversible. The main differences: the implant goes in your arm (not your uterus), lasts 3 years (vs. 3–12 for IUDs), and is progestin-only. The copper IUD is hormone-free. Insertion of the implant is generally considered less uncomfortable than an IUD. Your provider can help you compare based on your specific situation.
Want to explore your options?
Our Resources page lists trusted clinics where you can talk through birth control options confidentially and get the care you need.
Find a clinic near you