Long-acting contraceptives, one tablet a year will not have any effect, because it is only taken once in a while, even if the long-acting contraceptives will have some side effects, so that the performance will not be too obvious, because after taking one time to stop the use of the drug, so that the contraceptive effect of the use of contraceptives will not be good. Long-acting contraceptives should normally be taken on the fifth day of menstruation to start taking a tablet, the tenth or twentieth day to re-take a tablet, and then take the second time to take the time to prevail, every thirty days to take, so that there will be a contraceptive effect. Taking long-acting contraceptives once in a while is considered to be ineffective in contraception, which may easily lead to contraceptive failure and may also lead to menstrual disorders, but they can be adjusted on their own soon.