Depo-Provera (Depo) starts working immediately if the injection is given within the first 5 to 7 days of the menstrual cycle. If administered at any other time, it can take up to 7 days to become effective, during which backup contraception (like condoms) is recommended. To maintain its contraceptive effect, Depo-Provera injections need to be received every 12 to 13 weeks.
Key points about Depo-Provera effectiveness:
- Immediate protection if given within the first 5-7 days of the menstrual cycle.
- If given later, use backup contraception for 7 days.
- Injection lasts about 12 to 14 weeks.
- Late injections may reduce effectiveness.
- Regular injections every 12 to 13 weeks are crucial for ongoing contraception.
