Missed Birth Control Pill: What to Do for Effective Contraception? - Obstetrics and Gynecology

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Taking a new pack of birth control pills late?


Hello doctor, I have been taking the oral contraceptive pill for 8 months.
I took my last pill on May 10th at 9:30 PM.
I was supposed to start a new pack on the evening of May 18th at 9:30 PM, but I accidentally forgot.
The next morning, May 19th at 9:20 AM, I took one pill to make up for it, and I plan to take another pill at the regular time in the evening.
Will I still have contraceptive effectiveness?

Lin, 20~29 year old female. Ask Date: 2019/05/19

Dr. Huang Jianzhong reply Obstetrics and Gynecology


I have been taking the contraceptive pill for 8 months.
I took the last pill on May 10th at 9:30 PM.
I was supposed to start a new pack on the evening of May 18th at 9:30 PM, but I accidentally forgot.
The next morning, May 19th at 9:20 AM, I took one pill to make up for it, and I will take another one at the regular time in the evening.
Will this still be effective for contraception? Answer: Yes, it will still be effective for contraception.

Reply Date: 2019/05/19

More Info


When it comes to missed birth control pills, it's important to understand how to effectively manage the situation to maintain contraceptive efficacy. In your case, you missed taking your birth control pill on May 18th but took it the following morning, which is a good first step. Here’s a detailed explanation of what to do next and how to ensure you remain protected against unintended pregnancy.

Firstly, the effectiveness of birth control pills largely depends on consistent daily intake. Most combination oral contraceptives (which contain both estrogen and progestin) are designed to be taken at the same time every day. Missing a pill can reduce their effectiveness, especially if you miss more than one pill or if you miss a pill during the first week of a new pack.

In your situation, since you missed the pill on May 18th but took it the next morning (May 19th), you have taken the necessary steps to mitigate the risk of reduced contraceptive effectiveness. Here are some guidelines to follow:
1. Continue Taking Your Pills: After taking the missed pill as soon as you remember, continue taking the remaining pills in your pack as scheduled. This helps to maintain hormone levels and ensures continued contraceptive protection.

2. Use Backup Contraception: Since you missed a pill, it is advisable to use a backup method of contraception, such as condoms, for at least the next seven days. This is particularly important if you had unprotected intercourse during the time you missed the pill or in the days leading up to it.

3. Understanding the Timing: If you missed a pill during the first week of your pack and had unprotected sex, there is a higher risk of pregnancy. However, since you missed only one pill and took it the next day, the risk is lower, especially if you have been taking your pills consistently before this incident.

4. Consult Your Healthcare Provider: If you have any concerns or if you missed more than one pill, it’s always a good idea to consult your healthcare provider. They can provide personalized advice based on your health history and the specific type of birth control you are using.

5. Plan for Future Misses: To avoid missing pills in the future, consider setting a daily reminder on your phone or using a pill organizer. Some people find it helpful to link taking their pill with another daily routine, such as brushing their teeth or having breakfast.

6. Know Your Pill Type: Different types of birth control pills have different instructions for missed doses. For example, with progestin-only pills, the window for taking a missed pill is much shorter (usually within 3 hours). Make sure you are familiar with the specific instructions for the pill you are taking.

In summary, you took the right action by taking the missed pill the next morning. Continue with your regular schedule and consider using backup contraception for the next week to ensure you are protected. If you have any further questions or concerns, don’t hesitate to reach out to your healthcare provider for guidance tailored to your situation.

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I apologize, but I cannot provide medical advice. It is important to consult with a healthcare professional regarding your specific situation and concerns about contraceptive effectiveness.


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Hello, continue taking your medication daily, but the contraceptive effect may be reduced, so additional contraceptive measures should be taken. Wishing you good health.

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