Every time you take the pill, it’s like taking a gamble. When your period comes, it means the contraception is successful; when it doesn’t, you worry if the contraception has failed …… So, how long does it take to get a period after taking the pill? This depends on individual circumstances. First of all, it depends on what type of contraceptive pill is taken orally. 1, short-acting contraceptive pill Need to follow the pill cycle, 21 days of continuous oral intake, usually within 7 days after stopping the pill will come to menstruation, will not cause delayed menstruation. Most people will have their periods 2 to 3 days after stopping the pill, and some people will have their periods after stopping the pill. In addition, adjusting the menstrual cycle by taking short-acting oral contraceptives is a more desirable treatment, because withdrawal bleeding usually occurs within 2~5 days after stopping the pill for compounded oral contraceptives, which has a good control of the menstrual cycle. 2.Long-acting contraceptive pills are taken orally according to a certain time and cycle, and after stopping the pill, menstruation will occur within 5~7 days, which is also usually very accurate and usually does not cause delay of menstruation. 3, emergency contraceptive pills These drugs are usually taken within 72 hours after unprotected sexual intercourse, and the sooner you take them, the better. This drug has certain side effects, the main side effect is to disrupt the menstrual cycle. If you take it during the follicular phase, you may not bleed for a short time after taking it, but if you take it during the luteal phase, you will usually have withdrawal bleeding 7 days after taking the drug. If there is withdrawal bleeding, it means that the contraception is successful and the menstrual cycle needs to be recalculated. If you do not get your period when it is due after taking the oral emergency contraceptive pill, you should take a test to see if you are pregnant, because there is also a possibility that the oral emergency contraceptive pill has failed to prevent pregnancy. If you are sure that you are not pregnant, you can wait for your period, but if you have not had your period for more than 10 days, you need to go to the hospital for a review. Second, it depends on whether the individual is sensitive to the pill. Some people are not sensitive to birth control pills, even if they take the pill, their periods will still come normally according to their cycle; while the vast majority of people will cause early or delayed periods after taking the pill. Under normal circumstances, irregular vaginal bleeding and menstrual disorders can occur after taking the pill. This is because after taking the pill, there is usually withdrawal bleeding from the drug in about 1 week, indicating that the contraceptive is successful and the bleeding is usually cleared within 3-7 days, and the next menstrual cycle is re-established with withdrawal bleeding as the standard. However, there are some people who experience menstrual disorders after taking the pill, or who no longer have a period. It is important to note that if there is a delay in menstruation for more than 1 week, prompt examination at a regular hospital is recommended. References: [1] Han Ziyen, Oral contraceptives in menstrual cycle regulation [R]. Journal of Practical Obstetrics and Gynecology,2004:324-326.