Is Mild Uterine Pain Normal After Taking Emergency Contraceptive Pills? - Obstetrics and Gynecology

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Uterine pain after taking emergency contraceptive pills?


Hello, doctor.
I started taking Metformin on the third day, and I have been experiencing mild discomfort in my uterus.
Is this phenomenon considered normal? Could the medication be causing harm to my uterus? If I stop taking the medication, will it lead to infertility or a decreased chance of conception due to having taken this medication? Thank you, doctor.

Tuzi, 30~39 year old female. Ask Date: 2018/09/05

Dr. Lin Manying reply Obstetrics and Gynecology


Hello, Miss Rabbit: (1) If you are taking contraceptive pills and have regular gynecological examinations (such as ultrasound and pelvic exams), and there are no organic issues, the symptoms mentioned should be considered normal.
(2) Regular contraceptive pills do not cause infertility.
The Hualien Hospital of the Ministry of Health and Welfare cares about your health.

Reply Date: 2018/09/05

More Info


Mild uterine pain after taking emergency contraceptive pills (ECPs) like Levonorgestrel, commonly known as "Plan B" or "Postinor," can be a normal side effect. These medications work primarily by preventing ovulation, altering the endometrial lining, and possibly affecting sperm function. As a result, some women may experience mild cramping or discomfort in the uterus as their body reacts to the hormonal changes induced by the medication.

The pain you are experiencing is likely due to the hormonal fluctuations caused by the ECP. It is not uncommon for women to report symptoms such as breast tenderness, nausea, fatigue, and changes in menstrual bleeding patterns after taking these pills. Mild uterine cramping can be part of this symptomatology and is generally not a cause for concern. However, if the pain becomes severe or is accompanied by other alarming symptoms such as heavy bleeding, fever, or severe abdominal pain, it is essential to seek medical attention promptly.

Regarding your concern about potential long-term effects on fertility, emergency contraceptive pills are designed for occasional use and do not have lasting impacts on fertility. Research indicates that ECPs do not cause infertility or reduce the likelihood of becoming pregnant in the future. After taking ECPs, your menstrual cycle may be temporarily disrupted, but this is typically a short-term effect. Most women will return to their normal menstrual cycle within a few months after using ECPs.

It is also worth noting that the timing of your menstrual cycle can be affected by various factors, including stress, changes in weight, and hormonal fluctuations. If you have recently stopped using hormonal birth control, your body may still be adjusting, which can lead to irregularities in your cycle and associated symptoms.

If you continue to experience discomfort or have concerns about your menstrual cycle or fertility, it is advisable to consult with a healthcare provider. They can perform a thorough evaluation, discuss your symptoms, and provide guidance tailored to your specific situation.

In summary, mild uterine pain after taking emergency contraceptive pills is generally considered normal and is not indicative of harm to the uterus or future fertility. However, monitoring your symptoms and seeking medical advice if they worsen or persist is always a prudent approach.

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