Delayed menstruation for more than ten days, with a small amount of menstruation and light color, may be caused by pregnancy, menstrual disorders, pre-miscarriage and other reasons. 1. Pregnancy: If a fertile woman who has had sexual intercourse experiences a delay in menstruation for ten days, she needs to suspect pregnancy. Pregnancy can cause delayed menstruation, and the patient may also experience a small amount of vaginal bleeding. 2. Menstrual disorders: If a woman excludes pregnancy and experiences delayed menstruation, low menstrual flow and light color, it may be caused by menstrual disorders. A woman may experience endocrine dysfunction due to excessive mental stress, resulting in menstrual disorders, delayed menstruation, low menstrual flow, light color and so on. 3. Pre-eclampsia: If a woman does not find out that she is pregnant, and her period is delayed for ten days or so, with a small amount of menstrual flow and a light color, it may be a sign of pre-eclampsia after pregnancy. Based on the fact that a woman’s menstrual period is delayed for more than ten days, the menstrual flow is small and light in color can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended to consult a doctor in a timely manner, improve the relevant examinations, under the guidance of the doctor to clarify the cause of the disease, targeted treatment.