Emergency Contraceptive Pills: Effects on Constipation and Pregnancy Risks - Obstetrics and Gynecology

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Emergency contraceptive pills and constipation due to a cold?


I have been living in Japan for a long time and have been taking birth control pills for almost three years.
Since I am getting married to my Japanese boyfriend, I stopped taking the pills at the end of November 2015.
My first menstrual period after stopping the pills came on January 5.
I always used condoms, but on February 12, the condom broke during intercourse.
I took the emergency contraceptive pill, Ella, within 24 hours.
On February 14, I experienced diarrhea, and then I developed a sore throat and tonsillitis.
Until today, I have not had a bowel movement for five days.
Could my constipation be a side effect of the emergency contraceptive pill or due to my cold? I usually have bowel movements twice a day.
Also, is there a possibility that I could be pregnant? I have a sore throat and cannot eat much.
How can I improve my constipation? Is it really hormone-related? I am really stressed out these days.
Please help me, doctor.
Thank you.

Xiao Qing, 20~29 year old female. Ask Date: 2016/02/19

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, the chances of getting pregnant are low, and you should not rely on the safe period.
It is better to take preventive measures for contraception beforehand.
As for constipation, it is not related to birth control pills.
The way to improve constipation is to exercise more, eat high-fiber foods, and drink plenty of water.
Wishing you good health.

Reply Date: 2016/02/19

More Info


Emergency contraceptive pills (ECPs) are designed to prevent pregnancy after unprotected intercourse or contraceptive failure, such as a broken condom. They are most effective when taken as soon as possible after the incident, ideally within 72 hours, but some types can be taken up to five days later. In your case, you took the emergency contraceptive pill (ECP) within 24 hours of the condom breaking, which is a good practice for maximizing its effectiveness.

Regarding your concerns about constipation, it is important to note that hormonal changes from ECPs can lead to various side effects, including gastrointestinal disturbances. While constipation is not a commonly reported side effect of ECPs, hormonal fluctuations can affect bowel movements in some individuals. Additionally, the stress and anxiety surrounding the potential for pregnancy and your recent illness (throat infection) could also contribute to changes in your digestive system. Stress can lead to changes in gut motility, potentially causing constipation.

Your recent experience with diarrhea could also be a factor. Diarrhea can lead to dehydration, which can subsequently cause constipation. If you have been unable to eat much due to your throat pain, this could further exacerbate the situation, as a lack of dietary fiber can lead to constipation. It is essential to maintain a balanced diet rich in fiber, drink plenty of fluids, and engage in light physical activity if possible to help alleviate constipation.

As for your concern about the possibility of pregnancy, while ECPs are highly effective, no contraceptive method is 100% foolproof. If your menstrual cycle is regular and you have not experienced any unusual symptoms (such as severe abdominal pain or unusual bleeding), the likelihood of pregnancy is relatively low. However, if your period is delayed by more than a week from when you expect it, it would be wise to take a pregnancy test for peace of mind.

In summary, your constipation may be attributed to a combination of factors, including hormonal changes from the ECP, stress, and dietary habits due to your throat infection. To improve your bowel movements, focus on increasing your fiber intake through fruits, vegetables, and whole grains, stay hydrated, and consider gentle physical activity. If your symptoms persist or worsen, or if you have concerns about pregnancy, it is advisable to consult a healthcare professional for further evaluation and guidance.

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