The contraceptive pill taken once a month should be the compound long-acting oral contraceptive pill. Compound long-acting contraceptives are mainly composed of long-acting estrogen and synthetic progesterone, because of the large hormone content, so there are many side effects, the most common is the class of early pregnancy reaction and menstrual disorders, and even lead to amenorrhea. Although the oral contraceptive effect is good, but we need to pay attention to the regular taking, to avoid missing the dose, after the leakage of the dose in time to make up for the dose or to take other contraceptive methods of contraception. Compound long-acting contraceptive pill taking method, mainly on the fifth day of menstruation to take the first tablet, five days after the addition of a tablet, and then according to the date of the first dose of drugs, once a month.