Long-acting contraceptive pills usually take effect after one week, and taking long-acting contraceptive pills can easily cause damage to liver and kidney functions. It is best to have regular blood tests of liver and kidney functions during the use of the pill, and it is also easy to cause endocrine disorders and menstrual disorders, so it is best not to take the pill too often. Note that you should not stop taking the pill suddenly after taking long-acting contraceptives to avoid causing withdrawal bleeding. If you don’t want to get pregnant, you can take other forms of contraception, such as the contraceptive ring, condoms, etc. You can also have intercourse during the safe period, which is safer and will not have adverse effects on your body. However, if there is a delay in menstruation after taking the pill, this may be a side effect of the pill, it is best to check the hormone six, need to be under the guidance of the doctor reasonable use of drugs, usually pay attention to sleep enough, do not stay up late, etc. can improve the situation of menstruation.