Which is more effective, implant or injection?

Both are highly effective; the implant is over 99% effective and removes the risk of a late repeat injection.

They may stop, become irregular, lighter, heavier or more frequent. The pattern is difficult to predict before starting.

How soon can I get pregnant afterwards?

Fertility usually returns quickly after implant removal. After injections it may take up to a year, though some people conceive sooner.

Contraceptive implant and injection: Uses & Side Effects

Should I choose the contraceptive implant or injection?

The implant is a small progestogen rod placed under the arm and is over 99% effective for up to 5 years. The contraceptive injection lasts 8 to 13 weeks depending on the product. Both can change bleeding; fertility usually returns quickly after implant removal but may take up to a year after stopping injections.

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The implant

A trained clinician places a flexible rod under local anaesthetic. It can be felt under the skin and removed through a small procedure. Irregular bleeding is the most common reason for review.

The injection

Injections are repeated on schedule. Long-term use can temporarily reduce bone density, which generally recovers after stopping; individual risks and benefits should be discussed.

Choosing between them

Consider how you feel about a small procedure, injections, unpredictable bleeding, repeat appointments and how quickly you might want pregnancy.

Common questions about contraceptive implant and injection

Which is more effective, implant or injection?: Both are highly effective; the implant is over 99% effective and removes the risk of a late repeat injection.
Will periods stop?: They may stop, become irregular, lighter, heavier or more frequent. The pattern is difficult to predict before starting.
How soon can I get pregnant afterwards?: Fertility usually returns quickly after implant removal. After injections it may take up to a year, though some people conceive sooner.

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Contraceptive implant and injection