Regestrone contains a hormone called norethisterone, which acts like progesterone. Normally, a period is triggered when your body's progesterone levels suddenly drop. When you take this medication, it maintains high hormone levels, which can delay a period. However, when you finish your short prescribed course and stop taking it, your hormone levels suddenly drop. This rapid decline mimics your natural cycle, signaling your body to shed the uterine lining and start your period. It is a very safe and common way to help reset your cycle. Please follow your doctor's instructions on when to stop the medication.
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Why would my doctor prescribe Regestrone to help start my delayed period when online sources say this medicine is actually used to delay periods?