Bio-chemical pregnancy bleeding usually clears within a week. Biochemical pregnancy is a condition in which the fertilized egg combines and develops, but does not attach to the bed, and it often has no obvious symptoms, while some patients may experience delayed menstruation and slightly heavier menstrual flow. Some patients may experience lower abdominal pain, which is usually mild and can be relieved on its own, and its bleeding time does not exceed one week. A biochemical pregnancy with no obvious symptoms does not require treatment, but if repeated biochemical pregnancies need to seek medical attention to find the cause, it is generally believed that biochemical pregnancies are related to the quality of the sperm, the quality of the egg, the state of the endometrium, and immune abnormalities and other factors. If the bleeding of a biochemical pregnancy lasts more than a week and is accompanied by obvious discomfort, it is recommended to consult a doctor to find out the cause in order to rule out other conditions.