If you are taking Da-Ying 35 orally to regulate your menstruation, you should start taking it on the 5th day of your menstruation, and most of the vaginal bleeding will be significantly reduced in about 3 days after taking the drug, because the main components of Da-Ying 35 are estrogen and progestin. After taking it, the endometrium will be repaired as soon as possible, so the menstruation will be cleared soon. In case of abnormal menstruation, it is necessary to find out the cause before using the medication, especially for recurrent vaginal bleeding and prolonged menstruation, detailed examination should be done, such as ultrasound examination to understand the condition of the endometrium, once the endometrium is found to be thickened and unevenly echogenic, it is not recommended to take Da Ying 35 blindly, it is better to do diagnostic scraping after pathological diagnosis before deciding on the next treatment.