Impact of Emergency Contraceptive Pills on Breast Tumors: What You Need to Know - Surgery

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Emergency contraceptive pills and breast tumors?


Hello, doctor.
I am taking emergency contraception for the first time due to fear of pregnancy.
I would like to ask if taking the emergency contraceptive pill, which contains 1.5 mg of progestin (without estrogen), could potentially affect a breast tumor.
Thank you!

Xinxin, 20~29 year old female. Ask Date: 2016/09/17

Dr. Wu Yuting reply Surgery


Currently, there is no definitive conclusion regarding the impact of contraceptive pills on breast tumors.
Generally, taking them once has minimal effect, but for long-term considerations, it is advisable to consider alternative contraceptive methods.
************ Dr.
Wu Yu-Ting, Breast Surgery, Xinying Hospital *************

Reply Date: 2016/09/17

More Info


The use of emergency contraceptive pills (ECPs), such as the one you mentioned (often referred to as "Plan B" or "the morning-after pill"), raises important questions regarding their impact on breast health, particularly in individuals with existing breast tumors or fibrocystic breast changes.
Firstly, it’s essential to understand the composition of the ECP you mentioned. The active ingredient, levonorgestrel, is a synthetic progestin. ECPs are designed to prevent pregnancy after unprotected intercourse, primarily by inhibiting ovulation. They do not contain estrogen, which is significant because estrogen has been associated with breast tissue changes and can influence the growth of certain types of breast tumors.

Regarding your specific concerns about the impact of ECPs on breast tumors, current medical literature suggests that there is no direct evidence indicating that the use of levonorgestrel-based emergency contraceptive pills adversely affects benign breast tumors, such as fibroadenomas or cysts. These tumors are generally non-cancerous and are not influenced by hormonal fluctuations in the same way that malignant tumors can be. However, hormonal changes can lead to breast tenderness or discomfort, which may be experienced by some women after taking ECPs.

In your case, since you have a history of breast tumors, it is prudent to monitor any changes in your breast tissue after taking the ECP. While the likelihood of the ECP affecting your benign tumors is low, any new symptoms, such as increased pain, changes in the size of the lumps, or new lumps appearing, should be evaluated by a healthcare professional. Regular follow-ups with your healthcare provider are crucial, especially if you have a family history of breast cancer or other risk factors.

In terms of timing for follow-up, it is generally recommended to have regular breast examinations, especially if you have a history of breast tumors. If you notice any changes or have concerns after taking the ECP, you should schedule an appointment sooner rather than later. A healthcare provider may suggest imaging studies, such as an ultrasound or mammogram, to assess any changes in your breast tissue.

In summary, while the emergency contraceptive pill you mentioned is unlikely to have a significant impact on benign breast tumors, it is essential to remain vigilant about any changes in your breast health. Regular check-ups and open communication with your healthcare provider will help ensure that any potential issues are addressed promptly. If you have any further questions or concerns, do not hesitate to reach out to a healthcare professional for personalized advice.

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