The possible causes of delayed menstruation and increased leucorrhea include: 1. If there is no sexual life or there is a relatively safe and effective contraceptive measures, this situation is mostly considered because of various reasons caused by endocrine dysfunction of the ovaries, so that the time of menstruation is delayed. The increase in leucorrhea before the onset of menstruation is a normal phenomenon if there is no obvious itching and odor symptoms. You can observe for a few days, as long as the menstruation comes within a week, there is no big problem. 2, if there is a normal sexual life, and there is no effective contraceptive measures, this symptom, should be considered the possibility of pregnancy, can be carried out blood hcg laboratory test to clarify the diagnosis.