Why is there so much leukorrhea?

Patient's question:

Detailed medical condition and consultation purpose: Want to understand
Duration of this episode and persistence:
Current general condition:
Medical history: My menstrual cycle is sometimes irregular. Sometimes it's 10-20 days later than the expected period. Is this considered menstrual irregularity?

Doctor's answer:

Generally, the menstrual cycle is 28 to 30 days, and it is normal for menstruation to be one week early or late. There are many reasons that can cause a delayed menstrual period, such as: psychological factors, environmental factors, etc. If the delay is less than seven days, it is not a big concern. However, if the menstrual period is delayed for more than seven days, it is recommended to visit a regular hospital's gynecology department for blood HCG and ultrasound-related examinations after the delay of 7-10 days.