Birth Control Pills: Missed Doses and Pregnancy Risks

Issues with Taking Birth Control Pills

I started taking the oral contraceptive pill, Yejih, on September 11 (first time using it).
I forgot to take the penultimate pill, and after researching online, I found that I could stop the medication and start a new pack seven days later, so I stopped taking it on October 1.
My menstrual period started on October 5, and I began taking a new pill (as advised by the pharmacist, switching to Aiji) on the evening of October 8.
I had unprotected sexual intercourse on October 11, October 14, and October 18.

My questions are:
1.
Is this method of taking the pill correct? (I stopped after forgetting the last two pills and immediately started a new pack.)
2.
Is there a possibility of pregnancy from unprotected intercourse during those days?

Ms. Chen, 10~19 year old female. Ask Date: 2020/10/21

Dr. Zhang Kunmin reply Obstetrics and Gynecology

Hello, the situation you described can be managed in this way.
Combined oral contraceptives (COCs) must be taken at the same time every day.
When taken correctly, they can achieve a 99% effectiveness in preventing pregnancy.
Thank you! Wishing you peace and health.
Dr.
Zhang

Reply Date: 2020/10/21

More Info

Understanding birth control pills and their proper usage is crucial for effective pregnancy prevention. In your case, you started taking the birth control pill "悦己" on September 11, but missed a dose before stopping the medication entirely on October 1. You then switched to another pill, "爱己," starting on October 8. Let's break down your questions regarding the missed doses and the potential risks of pregnancy.

1. Is it correct to stop taking the pill after missing doses?
When you miss a dose of birth control pills, the general recommendation is to take the missed pill as soon as you remember. If you miss two or more pills, especially in the first week of a new pack, it is advised to use backup contraception (like condoms) for at least seven days after resuming the pills. Since you missed the second-to-last pill and then stopped taking the pills altogether, this could lead to a gap in contraceptive coverage. Stopping the pills after missing doses is not the recommended approach, as it can increase the risk of unintended pregnancy.

2. Could unprotected sex during that time lead to pregnancy?
Yes, there is a possibility of pregnancy if you had unprotected sex during the time when you were not consistently taking your birth control pills. The effectiveness of birth control pills relies on taking them consistently and correctly. Missing doses can lead to ovulation, which means that if you had unprotected sex during this time, there is a risk of becoming pregnant. The risk is particularly heightened if the missed doses occurred in the first week of a new pack, as this is when ovulation is most likely to occur if the pills are not taken as directed.

Additional Considerations:
- Switching Pills: When switching from one birth control pill to another, it is important to follow the guidance of a healthcare provider. They can provide specific instructions on how to transition safely and effectively to ensure continued contraceptive protection.

- Backup Contraception: If you miss pills or switch brands, using backup contraception (like condoms) for at least seven days is a prudent measure to prevent unintended pregnancy.

- Consulting a Healthcare Provider: If you have concerns about missed doses, potential pregnancy, or the effectiveness of your birth control method, it is advisable to consult with a healthcare provider. They can provide personalized advice based on your health history and current situation.

Conclusion:
In summary, it is essential to take birth control pills consistently and follow the instructions provided by healthcare professionals. Missing doses can compromise the effectiveness of the pill, leading to an increased risk of pregnancy. If you are concerned about the possibility of pregnancy due to missed doses and unprotected sex, consider taking a pregnancy test or consulting with a healthcare provider for further guidance.

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