Can You Get Pregnant? Risks After Missed Birth Control

Will this lead to pregnancy?

You started taking the first pack of contraceptive pills on the third day of your period, which lasted only until the third day.
You missed one pill on August 19 but took the remaining pills until August 29.
On August 29, you had sexual intercourse without a condom but did not ejaculate inside.
Is there a chance of pregnancy?

Miss Luo, 10~19 year old female. Ask Date: 2022/08/30

Dr. Zhang Kunmin reply Obstetrics and Gynecology

Hello,
Each type of combined oral contraceptive pill (COC) comes in different formulations and dosages.
It is important to take the contraceptive pills as directed.
If you forget to take a pill, you should take it as soon as you remember, and continue taking the next pill at the usual time.
If you miss a dose of an effective pill for more than 12 hours, in addition to taking the missed pill, it is advisable to use an additional barrier method of contraception for the next seven days.

Combined oral contraceptive pills must be taken at the same time every day to achieve a 99% effectiveness rate.
If you miss a pill and do not experience the expected withdrawal bleeding during the placebo period, you should consider the possibility of pregnancy.

Thank you! Wishing you peace and health.

Dr.
Zhang

Reply Date: 2022/08/30

More Info

When it comes to understanding the risks of pregnancy after a missed birth control pill, it’s essential to consider several factors, including the timing of your menstrual cycle, the effectiveness of the birth control method you are using, and the specifics of your situation.

In your case, you began taking the birth control pill (Yasmin) on the third day of your period, which is generally considered a safe time to start hormonal contraceptives. Birth control pills are most effective when taken consistently and correctly. However, missing a pill can reduce their effectiveness, especially if it happens during the first week of the pack. Since you missed a pill on August 19 and had unprotected intercourse on August 29, there is a potential risk of pregnancy.

The effectiveness of birth control pills is about 91% with typical use, which means that about 9 out of 100 women may become pregnant each year while using them. However, if pills are taken perfectly, the effectiveness can be as high as 99%. Missing a pill can lead to ovulation, which is the release of an egg from the ovary, and if sperm is present, fertilization can occur.

Since you missed a pill during the first week of your cycle and had unprotected sex shortly after, it is important to consider the following:
1. Timing of Ovulation: Ovulation typically occurs about 14 days before your next period. If you have a regular cycle, you may have ovulated around the time of your missed pill, increasing the risk of pregnancy.

2. Emergency Contraception: If you are concerned about the possibility of pregnancy, you may consider taking emergency contraception (Plan B) within 72 hours of unprotected intercourse. This can significantly reduce the risk of pregnancy if taken promptly.

3. Pregnancy Testing: If your period is late or you experience any early signs of pregnancy (such as nausea, breast tenderness, or fatigue), it would be wise to take a home pregnancy test or consult with a healthcare provider for further evaluation.

4. Future Contraceptive Use: To prevent similar situations in the future, consider setting reminders for taking your birth control pills or discussing with your healthcare provider about alternative contraceptive methods that may be more suitable for your lifestyle.

In summary, while there is a risk of pregnancy due to the missed pill and subsequent unprotected intercourse, the exact likelihood depends on various factors, including your individual cycle and timing of ovulation. It is advisable to monitor your menstrual cycle closely and consult with a healthcare provider for personalized advice and options moving forward.

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