Nothing happened. Nothing pregnant. What's going on?

Menstruation delay and pregnancy has been ruled out, depending on the situation to find out the cause. If the menstrual delay in less than a week, belong to the normal menstrual cycle fluctuations, do not need special treatment. If the menstrual cycle delay more than a week, generally and mental stress, mood swings, excessive diet weight loss, oral contraceptives or endocrine disorders related. It is recommended to go to the hospital to do B-ultrasound examination and six sex hormone examinations, treat according to endocrine results, maintain good living habits in life, maintain a happy mood, eat normally, and ensure the normal operation of menstruation.