How is withdrawal bleeding counted as a menstrual period?
When considering withdrawal bleeding as a menstrual period, the first day of bleeding is counted as the starting point. The details are as follows:
Withdrawal bleeding refers to vaginal bleeding caused by hormonal changes following the use of oral contraceptives, progesterone, or similar medications, which lead to shedding of the endometrial lining. It typically occurs about one week after stopping the medication and may vary in amount. When counting the menstrual period, the first day of bleeding is considered the beginning. The period ends when the bleeding stops, and the duration between these points constitutes the woman’s menstrual period. A normal menstrual period generally lasts 2–8 days. Bleeding lasting within this range is considered normal. If it lasts less than 2 days, it may be considered too short; if longer than 8 days, it may be considered prolonged.
It should be noted that if menstrual abnormalities occur—such as abdominal pain or excessively heavy bleeding—medical attention should be sought promptly. A gynecologist will conduct a detailed consultation and examination to determine the underlying cause and develop an appropriate treatment plan.