Irregular Menstrual Bleeding After Taking Delay Pills - Obstetrics and Gynecology

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Issues with menstrual regulation medications?


If you took one dose of emergency contraception and then your menstrual cycle started, but you stopped taking it, and now you are experiencing intermittent light red discharge with an unusual odor for two weeks, is this normal? Thank you.

Xiao Yu, 40~49 year old female. Ask Date: 2023/03/25

Dr. Huang Yuande reply Obstetrics and Gynecology


This is likely abnormal bleeding due to ovulation, rather than a result of a single dose of emergency contraception.
If it persists, it is advisable to consult a physician for further evaluation.

Reply Date: 2023/03/25

More Info


Irregular menstrual bleeding can be a common side effect after taking emergency contraceptive pills, often referred to as "delay pills." These medications, which contain hormones, can disrupt your normal menstrual cycle, leading to unexpected bleeding patterns.
When you take a single dose of an emergency contraceptive pill, it can cause your body to react in various ways. Initially, you may experience a normal period, but it can be followed by spotting or irregular bleeding, which may include light red or brown discharge. This is often due to the hormonal changes induced by the pill. The hormones in these pills can affect the lining of the uterus, leading to changes in your menstrual flow.

The presence of a faint red discharge with an unusual odor, especially if it persists for two weeks, could indicate several things. While it may be a continuation of the hormonal effects from the pill, it could also suggest other issues such as an infection or retained products of conception if you had a recent pregnancy. The odor associated with the discharge is particularly concerning, as it may indicate a bacterial infection or other underlying issues that require medical attention.

Here are some important considerations regarding your situation:
1. Hormonal Effects: After taking emergency contraception, it is not uncommon for women to experience changes in their menstrual cycle, including irregular bleeding, spotting, or changes in flow. This can last for a few weeks as your body readjusts to its normal hormonal levels.

2. Duration of Symptoms: If the irregular bleeding continues for more than a few weeks or if you experience significant changes in your menstrual cycle, it is advisable to consult a healthcare provider. They can perform a thorough evaluation to rule out any serious conditions.

3. Odor and Discharge: The presence of an unusual odor in your discharge is a red flag. It is essential to seek medical advice if you notice this symptom, as it could indicate an infection, such as bacterial vaginosis or a sexually transmitted infection (STI).

4. Follow-Up Care: If you have any concerns about your symptoms, including the duration and nature of your bleeding, it is crucial to follow up with a healthcare professional. They may recommend a pelvic examination, laboratory tests, or imaging studies to determine the cause of your symptoms.

5. Prevention and Education: Understanding how hormonal contraceptives work and their potential side effects can help you make informed decisions about your reproductive health. If you are considering using emergency contraception in the future, it may be beneficial to discuss it with a healthcare provider to understand the implications for your menstrual cycle and overall health.

In summary, while some irregular bleeding after taking emergency contraception can be normal, the persistence of symptoms, especially with an unusual odor, warrants a medical evaluation. It's always better to err on the side of caution when it comes to changes in your menstrual cycle or any unusual symptoms.

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