Women’s menstrual period is delayed for eight days, it may be pregnancy or endocrine disorder, as follows: First, pregnancy: after pregnancy, menstruation will not come, test urine HCG test paper can show positive, if you hope to have children, go to the hospital for blood test to determine, if you do not want to have children, after a few more days to do ultrasound, terminate the pregnancy. Second, endocrine disorders: in irregular life, excessive psychological stress, excessive work pressure, emotional abnormalities, may lead to endocrine disorders, ovarian ovulation abnormalities, and lead to irregular menstruation, you can do sex hormone six to see the ovarian ovulation function, you can eat progesterone, five days after stopping the drug, usually in seven days can come to menstruation. If there is no menstruation, it may be caused by low estrogen, you can do artificial cycle, supplemental estrogen and progesterone treatment.