Can You Start Taking Birth Control Pills Before Your Period? - Obstetrics and Gynecology

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Oral contraceptives


Hello, doctor.
I previously took the contraceptive pill for a while and stopped for over a year.
My menstrual cycle is not very regular, but it usually comes around every 30 days.
Since my last period, I have not had any sexual intercourse, so there is no possibility of pregnancy.
However, I may have the opportunity for sexual intercourse soon, and I would like to implement dual protection with condoms and pre-exposure contraceptive pills.
Two days ago was around the time my period was expected, but it still hasn't arrived.
I would like to know if I can start taking the pre-exposure contraceptive pills directly now.

Cai Xiaojie, 20~29 year old female. Ask Date: 2022/04/05

Dr. Wu Xianghui reply Obstetrics and Gynecology


According to the medication instructions, theoretically, taking it for more than 7 days can provide contraceptive effects.
However, unconventional use cannot guarantee complete effectiveness.

Reply Date: 2022/04/05

More Info


When it comes to starting birth control pills, especially if your period is delayed, it's essential to understand how these medications work and the best practices for their use. Birth control pills, commonly referred to as oral contraceptives, are designed to prevent ovulation, regulate menstrual cycles, and provide a reliable method of contraception when taken correctly.

In your case, since you mentioned that your menstrual cycle is typically around 30 days but has not yet arrived, you might be wondering if you can start taking the pills now. The general recommendation is that if you are starting birth control pills for the first time or after a break, it is best to wait until your period arrives to ensure that you are not pregnant. However, if your period is significantly delayed, there are a few considerations to keep in mind.

1. Pregnancy Test: Before starting the birth control pills, it is advisable to take a home pregnancy test. This is crucial because if you are pregnant, taking birth control pills is not recommended. If the test is negative and you are sure you are not pregnant, you can proceed with starting the pills.

2. Starting the Pills: If you decide to start the pills before your period arrives, you can do so. Most healthcare providers suggest starting the pills at any time in your cycle, but if you start them when you are not on your period, you should use an additional method of contraception (like condoms) for the first seven days of taking the pills to ensure you are protected against pregnancy.

3. Cycle Regulation: Starting the pill can help regulate your menstrual cycle over time. Many women find that their periods become more predictable and manageable once they are on the pill consistently for a few months.

4. Consult Your Doctor: Since you have a history of taking birth control pills and have been off them for over a year, it would be wise to consult with your healthcare provider. They can provide personalized advice based on your medical history, current health status, and any concerns you may have about starting the pills again.

5. Potential Side Effects: Be aware of potential side effects when starting birth control pills, such as nausea, breast tenderness, or mood changes. These are usually temporary and may subside after a few months of use.

6. Follow-Up: After starting the pills, keep track of how your body responds. If you experience any unusual symptoms or have concerns, follow up with your healthcare provider for further evaluation.

In summary, you can start taking birth control pills even if your period is delayed, but it is essential to confirm that you are not pregnant first. Using a pregnancy test is a good first step. If the test is negative, you can begin taking the pills and should use additional contraception for the first week. Always consult with your healthcare provider for tailored advice and to ensure that you are making the best decision for your reproductive health.

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Hello, you should start taking the birth control pill on the fifth day of your menstrual period. It doesn't have to be taken at the exact same time each day; a general timeframe is sufficient. As long as you take it consistently, it will be effective for contraception. It se...

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Dr. Zhang Kunmin reply Obstetrics and Gynecology
Hello, the first time you take birth control pills, it is recommended to start on the first day of your menstrual cycle. Given your situation, it is advisable to use other methods of contraception for now. Thank you! Wishing you peace and health, Dr. Chang.

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