Yes, taking an emergency contraceptive pill like Unwanted 72 (which contains levonorgestrel) can definitely cause a delay in your next period. Because it delivers a temporary burst of hormones to prevent pregnancy, it can temporarily upset your natural cycle. Your period may be a few days early or up to a week late. This is a very common and expected side effect. However, if your period is delayed by more than seven days, it is always a good idea to take a simple home pregnancy test just for peace of mind.
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Can taking an emergency contraceptive pill like Unwanted 72 cause a delay in the subsequent menstrual period?