Can You Prevent Pregnancy After Missing Birth Control Pills?

Pregnancy probability

Hello, doctor.
I took short-term contraceptive pills (prevention pills) for 8 days.
After having unprotected intercourse, I missed a dose the next day and haven't been able to find the pill to take since.
Now, it's been 2 days.
Is there any way to remedy this? What is the likelihood of pregnancy? Thank you.

jojo, 20~29 year old female. Ask Date: 2019/01/28

Dr. Huang Jianzhong reply Obstetrics and Gynecology

After taking short-term contraceptive pills (prevention pills) for 8 days, I had unprotected intercourse and did not take the pill the next day.
I have been unable to find the pills to take as a supplement.
Now, two days have passed.
Is there any way to remedy this? Answer: If I take emergency contraception, what are the chances of pregnancy? Answer: It's hard to say.

Reply Date: 2019/01/28

More Info

When it comes to preventing pregnancy after missing birth control pills, it's important to understand how hormonal contraceptives work and the implications of missing doses. Birth control pills are designed to maintain consistent hormone levels in the body to prevent ovulation. When you miss a pill, especially during the first week of starting a new pack, the risk of ovulation increases, which can lead to unintended pregnancy.

In your case, since you have taken the birth control pills for eight days and then missed one, the effectiveness of the contraceptive method may be compromised. The general recommendation for missed pills is to take the missed pill as soon as you remember, even if it means taking two pills in one day. However, since you mentioned that you were unable to find the pill to take it, this complicates the situation.

If you have had unprotected intercourse after missing a pill, the likelihood of pregnancy depends on several factors, including when you ovulate. If you missed the pill during the first week and had intercourse, there is a higher chance of pregnancy because ovulation could occur if the hormone levels drop significantly.
To mitigate the risk of pregnancy after missing a pill, you might consider using emergency contraception (EC), commonly known as the "morning-after pill." EC is most effective when taken as soon as possible after unprotected intercourse, ideally within 72 hours, but some forms can be effective up to 5 days after. It works primarily by delaying ovulation and preventing fertilization.

In terms of the likelihood of pregnancy, if you missed a pill and had unprotected sex, the risk can vary. Studies suggest that the chance of pregnancy can be as high as 20% or more, depending on the timing of your cycle and when ovulation occurs. If you are concerned about the possibility of being pregnant, consider taking a home pregnancy test about a week after your expected period.
Additionally, it’s crucial to consult with a healthcare provider for personalized advice. They can offer guidance on the best course of action, including the use of emergency contraception and what to do moving forward with your birth control method.
In summary, if you miss a birth control pill, take it as soon as you remember, and consider emergency contraception if you had unprotected sex. Monitor your cycle and take a pregnancy test if your period is late. Always consult with a healthcare professional for tailored advice and support regarding your reproductive health.

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