What to Do If You Forget to Start Your Birth Control Pill for 7 Days? - Obstetrics and Gynecology

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I forgot to start my new pack of birth control pills for 7 days?


Hello, doctor.
I have been taking birth control pills consistently for several months, but I forgot to take any pills from the new pack for 7 days (I was supposed to start on December 10, with my period starting on December 6 and ending on December 11).
How should I proceed with the new pack? Can I start taking them now, or should I wait until the first day of my next period? Thank you.

Chen, 30~39 year old female. Ask Date: 2020/12/16

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, I will start taking the first pack next month.
Wishing you good health.

Reply Date: 2020/12/16

More Info


If you forget to start your birth control pill for 7 days, it’s important to take immediate action to ensure your contraceptive protection is restored. Here’s a detailed guide on what to do in this situation, along with some additional insights into the use of birth control pills.

First and foremost, if you have missed taking your birth control pills for 7 days, you should start taking the pills as soon as you remember. However, since you have missed an entire week, it is crucial to understand that your contraceptive protection will be compromised. Here’s a step-by-step approach to follow:
1. Start Taking the Pills Immediately: Begin taking the missed pills as soon as you remember. If you are starting a new pack, take the first pill of that pack right away.

2. Use Backup Contraception: Since you missed a week of pills, it is recommended to use a backup method of contraception, such as condoms, for at least the next 7 days. This will help prevent unintended pregnancy during this time when the effectiveness of the pills is uncertain.

3. Monitor for Any Signs of Pregnancy: If you had unprotected intercourse during the week you missed the pills, be aware of any signs of pregnancy. If you suspect you might be pregnant, consider taking a pregnancy test or consulting your healthcare provider.

4. Consult Your Healthcare Provider: It’s always a good idea to reach out to your healthcare provider for personalized advice. They can provide guidance based on your specific situation and the type of birth control pill you are using.

5. Consider Your Cycle: Since your last menstrual period started on December 6 and ended on December 11, you should be aware of your cycle. If you are starting a new pack after your period, you can begin taking the pills immediately. However, if you are unsure about your cycle or have any concerns, consulting with a healthcare professional is advisable.

6. Future Prevention: To avoid missing pills in the future, consider setting reminders on your phone or using a pill organizer. Some people find it helpful to take their pills at the same time every day, which can make it easier to remember.

In terms of medical knowledge, it is important to understand how birth control pills work. They primarily function by preventing ovulation, thickening cervical mucus to block sperm, and thinning the uterine lining to prevent implantation. When pills are missed, especially for an extended period, the hormonal balance can be disrupted, leading to a risk of ovulation and potential pregnancy.

In conclusion, if you forget to start your birth control pill for 7 days, begin taking the pills immediately, use backup contraception, and consult your healthcare provider for further guidance. Being proactive and informed about your contraceptive methods will help you maintain effective birth control and avoid unintended pregnancies.

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