The short explanation
Yes, fertility usually returns after stopping the contraceptive injection, but it can take longer than with other methods. On average, it can take several months, and sometimes up to a year or more, for periods and ovulation to return to normal after the last injection. This delay is temporary; the injection does not cause permanent infertility. If periods have not become regular a year after your last injection, or if you have other symptoms, it is reasonable to see a doctor. They can check for other causes of irregular periods, such as PCOS or thyroid problems, and arrange fertility tests for both you and your partner if needed.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Tracking your cycles helps you and your doctor see whether ovulation is returning.
- Healthy habits, such as balanced eating, regular activity and not smoking, support fertility for both partners.
- Folic acid is usually recommended before and during early pregnancy; ask your doctor.
- If you are over 35, earlier review is generally advised.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell when your fertility will return. A doctor can check for other causes if periods stay irregular.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- How long can it take for fertility to return after the injection?
- Should I have tests for other causes of irregular periods?
- Should my partner be tested?
- When should we consider fertility treatment?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Book an appointment soon
- See a doctor within a few days if you have a positive pregnancy test with pain or bleeding.
Raise it at a routine appointment
- Book a routine appointment if periods are still irregular a year after your last injection.
- See a doctor sooner if you are over 35 or have other symptoms.
Sources
The evidence this explanation is built on.
- Contraceptive injection NHS
- Contraception NHS
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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