Menstrual slow or less or chaos
Pregnancy is the first consideration if not menstruation.
98% is caused by hormonal imbalance, you can physical examination (acne, hair, fat and thin, milk secretion), blood and vaginal ultrasound detection
2% is recommended for other reasons, in view of the above may check the etiology, you can rest assured
Of course, according to the ease of examination and the incidence of your personal situation, please order the order of the doctor is not all check completed