What is the reason for the delay of the period?

In addition, intestinal and urinary tract diseases can also cause lower abdominal pain. Some women will show headache, breast pain, abdominal distension, limb edema, weight gain, anxiety, irritability and other performance before menstruation 1 week, menstrual cramps quickly reduced until disappeared, was a periodic attack, known as premenstrual syndrome. If menstruation delayed within a week is not abnormal. If menstruation is delayed for more than a week, abdominal pain, to highly suspect ectopic pregnancy or threatened abortion, to carry out pregnancy-related examinations.