Do You Need Extra Contraception After Starting Birth Control Pills Again? - Obstetrics and Gynecology

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Birth control pill issues?


Hello, Doctor.
I have a question that has been confusing me: I have been taking a 21-day pack of Yasmin birth control pills for the past six months.
The instructions state to start a new pack on the eighth day after finishing the last pill, and my period comes after the last pill.
I have just finished one pack of birth control pills and am currently on my period.
I would like to know if I need to use additional contraception (like condoms) when I start the first pill of the new pack, or if I already have contraceptive effectiveness and do not need to use additional contraception.
Thank you! :)

Wang, 20~29 year old female. Ask Date: 2018/08/01

Dr. Huang Jianzhong reply Obstetrics and Gynecology


I have been taking the 21-pill pack of Yasmin birth control pills for the past six months.
The instructions state to start a new pack on the eighth day after finishing the last pill, and my period comes after the last pill.
I have just finished one pack of birth control pills and am currently on my period.
I would like to know if I need to use additional contraception (like condoms) when I start the first pill of the new pack, or if the contraceptive effect is already effective and I do not need to use additional contraception.

Answer: The contraceptive effect is already effective, and you do not need to use additional contraception.

Reply Date: 2018/08/01

More Info


When it comes to the use of birth control pills, understanding their effectiveness and the need for additional contraception can be crucial for ensuring proper family planning. Based on your situation, you have been taking a 21-day pack of birth control pills (like Yasmin) consistently for the past six months. You mentioned that your menstrual period started after finishing the last pill of the pack, which is a normal occurrence when taking combination oral contraceptives.

To address your question directly: If you start your new pack of birth control pills on schedule, which is the eighth day after finishing the last pill of the previous pack, you should not need any additional contraception, such as condoms, as long as you have taken your pills correctly and consistently. Birth control pills are designed to maintain their contraceptive effectiveness when taken as directed, and starting a new pack on time ensures that you remain protected against pregnancy.

However, there are a few important points to consider:
1. Consistency is Key: The effectiveness of birth control pills relies heavily on taking them consistently at the same time every day. If you miss a pill or take it late, this could reduce their effectiveness and increase the risk of unintended pregnancy.

2. Understanding the Pill Cycle: After completing a 21-day pack, you typically have a 7-day break during which you may experience withdrawal bleeding (similar to a menstrual period). This is a normal part of the cycle. When you start the new pack, you should do so on the eighth day, regardless of whether you are still bleeding or not.

3. Backup Contraception: If you have missed any pills in the previous cycle or if you are starting the pill for the first time, it is advisable to use backup contraception (like condoms) for at least the first seven days of taking the new pack. This is to ensure that you are fully protected against pregnancy.

4. Consult Your Healthcare Provider: If you have any doubts or specific health concerns, it is always best to consult with your healthcare provider. They can provide personalized advice based on your medical history and any other medications you may be taking.

5. Potential Side Effects: While birth control pills are generally safe for most women, they can have side effects. It’s important to monitor how you feel while on the pill and report any unusual symptoms to your doctor.

In summary, as long as you start your new pack of birth control pills on time and have taken your previous pills correctly, you should not need additional contraception. However, if you have any concerns about missed pills or specific health conditions, consulting with your healthcare provider is always a prudent step.

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Dr. Zhang Kunmin reply Obstetrics and Gynecology
Hello, based on your description, it is still recommended to take additional contraceptive precautions during the first seven days after starting the medication. Thank you! Wishing you safety and health. Dr. Chang

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Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, it's not necessary to worry. If your period is overdue, it's advisable to consult a gynecologist for an examination. Wishing you good health.

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