The contraceptive patch is a thin patch of 4.5x4.5 cm. You apply a new patch to your skin every week. After three weeks, you have a stop week and a period. If you stop using the patch, you can soon become pregnant again.
Advantages: You only have to think about it once a week. You can postpone your period by skipping your stop week.
Disadvantages: The patch is visible. The patch is less reliable in women heavier than 90 kg.