Can You Get Pregnant While on Birth Control Pills? - Obstetrics and Gynecology

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Can I get pregnant?


Hello doctor, I have been taking the oral contraceptive pill for three months now without missing a dose, and my menstrual periods have been regular.
My expected period for October is on the 15th, and my September period was from the 17th to the 22nd.
On September 30th, I had sexual intercourse while using a condom.
However, my boyfriend initially put the condom on the wrong way and only touched the tip of the penis before switching to the correct side.
Is there a risk of pregnancy from this? Recently, I have been taking medication for gastroenteritis and also for cough and runny nose, ensuring that I spaced them at least two hours apart from the contraceptive pill.
Will this affect the efficacy of the contraceptive pill?

Huang, 10~19 year old female. Ask Date: 2017/10/02

Dr. Huang Jianzhong reply Obstetrics and Gynecology


I have been taking the contraceptive pill for three months without missing any doses, and my menstrual periods have been regular.
My expected period for October is on the 15th, and my September period was from the 17th to the 22nd.
I had sexual intercourse on September 30th, during which we used a condom.
However, my boyfriend initially put the condom on inside out and it only made contact with the glans before we switched to the correct side.
Will this result in pregnancy?
Answer: Since you have been taking the contraceptive pill for three months without missing any doses, and your September period was from the 17th to the 22nd, having sexual intercourse on September 30th with the condom used correctly afterward will not result in pregnancy.
Additionally, you have been taking medication for gastroenteritis and for cough and runny nose, ensuring that there is a gap of more than two hours between these medications and the contraceptive pill.
This will not affect the efficacy of the contraceptive pill.

Reply Date: 2017/10/02

More Info


When it comes to the question of whether you can get pregnant while on birth control pills, the answer is generally no, provided that the pills are taken correctly and consistently. Birth control pills are designed to prevent ovulation, which means that if taken as directed, they are highly effective at preventing pregnancy. However, there are several factors to consider that could potentially affect their efficacy.

Firstly, it’s important to note that the effectiveness of birth control pills can be compromised if they are not taken consistently. Since you mentioned that you have been taking your pills without missing any doses for three months, you are likely protected against pregnancy. However, the situation you described regarding your boyfriend's condom usage raises some concerns. If the condom was only partially used and did not break or leak, the risk of pregnancy remains low, especially since you were on birth control pills.
Additionally, you mentioned that you have been taking medications for gastrointestinal issues and a cold. Some medications can interact with birth control pills and potentially reduce their effectiveness. For example, certain antibiotics and medications for seizures can interfere with how the body metabolizes the hormones in birth control pills. However, most common medications for gastrointestinal issues and cold symptoms do not typically affect the efficacy of birth control pills, especially if you took them with a sufficient time gap as you indicated (two hours apart).

It’s also worth mentioning that if you experience any gastrointestinal issues such as vomiting or severe diarrhea shortly after taking your birth control pill, this could affect absorption and, consequently, the pill's effectiveness. In such cases, it is advisable to use a backup method of contraception, such as condoms, until you can confirm that the birth control is still effective.

In your case, since you have been diligent about taking your pills and have used condoms during intercourse, the likelihood of pregnancy is quite low. However, if you have any concerns or experience any unusual symptoms, it may be wise to take a pregnancy test or consult with your healthcare provider for peace of mind.

Lastly, if you are considering long-term birth control options or have concerns about your current method, discussing these with your healthcare provider can help you find the best solution tailored to your needs. They can provide guidance on alternative methods, potential interactions with other medications, and any other questions you may have regarding reproductive health.
In summary, while the risk of pregnancy while on birth control pills is low when taken correctly, factors such as medication interactions and proper condom use should always be considered. If you have any doubts or experience any changes in your health, do not hesitate to reach out to a healthcare professional for personalized advice.

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