What’s wrong with a period that’s 10 days late and hasn’t come yet? First of all, there are several reasons that can lead to delayed menstruation: First, to doubt whether the pregnancy, have a history of sexual intercourse of women of childbearing age, menstruation delayed for 10 days, first of all, to rule out pregnancy, the early test can be used to test the pregnancy test paper, and to observe the breasts whether there is swelling and pain, nausea, and other symptoms, the most accurate method to the hospital to check the blood of the HCG, to make clear whether or not the pregnancy; Secondly, it is the medication, the long term use of contraceptives, and gastric motivation drugs The most accurate way to check the blood HCG is to make sure that you are pregnant; two, it is the drugs, long-term use of contraceptives, and gastric motivation drugs, such as morphine, can cause irregular menstruation, or even amenorrhea; three, it is caused by the surgery, such as abortion, uterine horn surgery can cause the endometrium, so that menstruation is delayed; four, it is the endocrine imbalance, such as polycystic ovary syndrome, premature ovarian failure, and other endocrine causes lead to delayed menstruation; five, it is inappropriate contact with the long-term radiation chemicals can also cause premature ovarian failure, leading to delayed menstruation; six. Is the living without degrees, often stay up late, and irregular work and rest of women, menstrual delay is often accompanied by low menstrual flow, dysmenorrhea, usually eat cold; seven, is the diet is not appropriate, the menstrual period by the cold stimuli, such as cold food, drink cold beverages, the pelvic blood contraction excessively, causing menstrual failure, or even amenorrhea; eight, chronic diseases, hepatitis tuberculosis, tumors, thyroid and other diseases, can cause menstruation delay; nine. Nine, is mental tension, excessive worry, often lead to delayed menstruation, often accompanied by breast swelling, chest tightness. All of the above nine points can cause delayed menstruation.