7 days later, why not?

Menstruation delay seven days did not come first consider physiological factors, such as pregnancy may cause menstruation delay, if the cause of pregnancy has been ruled out, then we must consider pathological factors, such as endocrine disorders or hormone levels changes will also cause women menstruation delay, if women do not regularly eat some cold stimulating food for a long time, then it will stimulate menstruation caused by menstruation delay. Because clinically there are some gynecological diseases will also show menstrual delay, so it is recommended to do treatment after the examination.