Is it dangerous to eat contraceptives for two months in a row?

The number of times a year to take contraceptives will not exceed three times, two months in a row to take contraceptives will lead to menstrual disorders, increased menstrual blood volume, amenorrhea, and even affect fertility function; should immediately stop taking contraceptives, and to the regular hospital obstetrics do sex hormones six, B ultrasound and salpingography examination.