Menstrual cycle changes

Change in menstrual cycle: The interval between the first days of two menstrual cycles is called a menstrual cycle, which is usually 28-30 days. The normal menstrual cycle is 28-35 days. The length of the cycle can vary from person to person, 7-10 before or after. The sky can be regarded as a normal range, and as long as a certain regularity can be maintained, it cannot be considered as irregular menstruation. It should be noted that a period change of more than 7 days can be regarded as a cyclic abnormality. If it changes only 3 or 5 days without other obvious symptoms, it is within the normal range; or it is occasionally advanced or delayed once. Morbid.