OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

For how long is the implant effective in preventing pregnancy?

1. 1 year

2. 2 years

3. 3 years

4. 5 years

The correct answer is: 3 years

The implant is a form of long-acting reversible contraception that is effective in preventing pregnancy for up to 3 years. This form of birth control is a small, flexible rod that is inserted under the skin of the upper arm by a healthcare professional. It releases a hormone called etonogestrel, which helps to prevent ovulation, thicken cervical mucus, and thin the lining of the uterus, making it less likely for a fertilized egg to implant. The effectiveness of the implant for 3 years allows for long-term family planning without requiring daily attentiveness, making it a suitable option for many individuals. It is also notable that after 3 years, the implant may become less effective, and another method of contraception would be needed to ensure ongoing pregnancy prevention. Understanding the duration of effectiveness is crucial when making informed decisions about contraception. Different forms of birth control have varying timelines for effectiveness, and being aware of these differences helps in planning and preventing unintended pregnancies.