Delayed menstruation and the appearance of a large number of blood clots, may be due to the following reasons: 1, to rule out the possibility of pregnancy, because under normal circumstances, menstrual blood rarely appear clots, once the phenomenon of menopause and vaginal bleeding with clots, the need to rule out the possibility of pregnancy, it is recommended that the use of morning urine to do the early pregnancy test, or to go to the hospital to draw blood to check the blood of HCG can be to understand whether the pregnancy, according to the results of the treatment. 2, the more common is caused by endocrine disorders, daily life can lead to many causes of endocrine disorders, such as stress, poor rest, environmental changes may lead to endocrine disorders, it is recommended to analyze with clinical history. If it is endocrine disorders, you can orally take Bazhen granules to give the corresponding regulation.