What is the difference between withdrawal bleeding and menstruation?

Patient's question:

No

Doctor's answer:

Withdrawal bleeding occurs after taking hormone drugs, where stopping the medication leads to the shedding of the endometrium and subsequent bleeding. Normal menstruation also occurs as a result of hormonal changes within the body. Therefore, withdrawal bleeding is the menstruation that arises from artificially administered hormones, while a normal menstrual cycle is the outcome of the body's own endocrine regulation.