Missed Birth Control Pill: Risk of Pregnancy After Late Dose? - Obstetrics and Gynecology

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Taking emergency contraception late?


Hello doctor, I would like to ask about my situation.
I have been taking my medication consistently for over two years at 7:40 PM.
On December 22, I forgot to take my medication and ended up taking it at 1:20 AM.
The next evening, I took the 24th pill around 9 PM.
That day, I had unprotected intercourse with ejaculation.
Is there a chance of pregnancy?

Awen, 20~29 year old female. Ask Date: 2023/12/24

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, it should be the safe period.
Wishing you good health.

Reply Date: 2023/12/24

More Info


When it comes to missed birth control pills and the risk of pregnancy, it's important to understand how hormonal contraceptives work and the implications of taking them inconsistently. Birth control pills, like the one you mentioned (Yasmin), are designed to maintain stable hormone levels in your body to prevent ovulation. If you miss a pill or take it late, especially if it’s more than 12 hours past your usual time, the effectiveness of the pill can be compromised.

In your case, you took your pill late—almost six hours past your usual time. While this is not ideal, the risk of pregnancy largely depends on how consistently you have taken your pills prior to this incident. If you have been taking your birth control pills correctly for the previous weeks, the risk of pregnancy is still relatively low, but it is not zero. The effectiveness of the pill can decrease if it is taken late, especially if you had unprotected intercourse shortly after missing a dose.
The general recommendation for missed pills is as follows: If you miss a pill, take it as soon as you remember. If you remember on the same day, you should continue taking your pills as usual. If you miss a pill and it’s been more than 24 hours, you should take the missed pill as soon as you remember and continue with your regular schedule, but you should also use a backup method of contraception (like condoms) for the next seven days to ensure protection against pregnancy.

Since you mentioned having unprotected sex after taking the late pill, there is a possibility of pregnancy, albeit a reduced one if you have been consistent with your pill regimen prior to this incident. If you are concerned about the possibility of pregnancy, you might consider taking a home pregnancy test if your period is late or consult with your healthcare provider for further advice.

Regarding your question about alcohol consumption while potentially pregnant, if you are indeed pregnant, drinking alcohol can pose risks to fetal development, especially in the early weeks of pregnancy when the fetus is most vulnerable. Alcohol consumption during pregnancy can lead to fetal alcohol spectrum disorders (FASDs), which can cause a range of physical, behavioral, and learning problems in the child. If you suspect you might be pregnant, it is advisable to stop drinking alcohol and consult with your healthcare provider for guidance.

In summary, while the risk of pregnancy after a late dose of birth control exists, it is not guaranteed. If you are worried about the possibility of being pregnant, taking a pregnancy test after a missed period is a good next step. Additionally, if you are pregnant, it is crucial to avoid alcohol and seek medical advice to ensure the health of both you and your potential child.

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Hello, generally it does not have an impact. Wishing you good health.

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