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

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What happens during the 4-week cycle of using a contraceptive patch?

The patch is worn continuously without breaks
The patch is replaced weekly for three weeks
The patch is only effective during menstruation
The patch must be worn only during intercourse

The correct answer is: The patch is replaced weekly for three weeks

The contraceptive patch is designed to release hormones that prevent ovulation and regulate the menstrual cycle, and it is used in a specific way to maximize its effectiveness. During the 4-week cycle, the correct process involves replacing the patch weekly for three weeks, which allows a consistent release of hormones into the bloodstream. By applying a new patch weekly for the first three weeks, users help maintain hormone levels necessary to inhibit ovulation. In the fourth week, no patch is worn, allowing for a hormone-free period during which menstruation occurs. This cycle not only helps in preventing pregnancy but also provides a predictable menstrual pattern for those using it. The method of continuously wearing the patch without breaks or only during menstruation does not align with how the patch is intended to be used, as the patch must be changed weekly and provides hormonal regulation throughout the entire cycle. Furthermore, wearing the patch solely during intercourse does not utilize its continuous hormonal delivery system, which is crucial for its effectiveness as a contraceptive method.