Delayed Menstruation: Causes and Next Steps - Obstetrics and Gynecology

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Delayed menstruation?


Hello Doctor: I got my period on May 29, had sexual intercourse on June 2, and took emergency contraception within an hour.
I took a pregnancy test on June 24, which showed one line.
My period was expected on June 26, but it did not come.
I visited the clinic on June 27, where I had an abdominal ultrasound and a urine test (which was negative).
The doctor prescribed me medication to induce my period, and I received an injection to induce menstruation on June 29.
Today, the pregnancy test still shows one line, and I currently have no symptoms of menstruation.
What recommendations do you have?

MS.S, 30~39 year old female. Ask Date: 2023/07/03

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, you should not be pregnant.
Your period should come within a week after getting the shot, so just wait a bit longer.
Wishing you good health.

Reply Date: 2023/07/03

More Info


Delayed menstruation can be a source of concern for many women, especially when it follows a recent sexual encounter and the use of emergency contraception. In your case, you experienced a delay in your menstrual cycle after taking a post-coital contraceptive pill, which is designed to prevent pregnancy after unprotected intercourse. However, it is important to understand that these medications can sometimes cause temporary disruptions in your menstrual cycle.

The timeline you've provided indicates that you had your last menstrual period on May 29, engaged in sexual activity on June 2, and took the emergency contraceptive pill shortly thereafter. Your expected period on June 26 did not occur, and subsequent tests have shown negative results for pregnancy. The use of ultrasound and urine tests further confirmed the absence of pregnancy, which is reassuring.

There are several potential reasons for your delayed menstruation:
1. Hormonal Imbalance: The emergency contraceptive pill can lead to hormonal fluctuations that may delay your period. This is a common side effect and can result in your cycle being disrupted for a month or more.

2. Stress: Emotional or physical stress can impact your menstrual cycle. Factors such as anxiety about potential pregnancy, changes in routine, or other life stressors can contribute to a delay.

3. Weight Changes: Significant weight loss or gain can also affect your menstrual cycle. If you have experienced any changes in your weight recently, this could be a contributing factor.

4. Underlying Health Conditions: Conditions such as polycystic ovary syndrome (PCOS), thyroid disorders, or other hormonal issues can lead to irregularities in your menstrual cycle.

5. Other Medications: If you are taking any other medications, they could potentially interact with your hormonal balance and affect your cycle.

Given that you have already consulted with a healthcare provider, it is advisable to follow their recommendations. The administration of a menstrual induction medication and an injection suggests that your doctor is taking steps to help regulate your cycle. If your period does not return within a reasonable timeframe after these interventions, further evaluation may be necessary.

Here are some steps you can take moving forward:
- Monitor Symptoms: Keep track of any additional symptoms you may experience, such as abdominal pain, unusual discharge, or changes in mood. This information can be helpful for your healthcare provider.

- Follow-Up Appointment: If your period does not resume within a few weeks after the administration of the medication, consider scheduling a follow-up appointment with your healthcare provider. They may want to conduct further tests to rule out any underlying conditions.

- Lifestyle Adjustments: Consider lifestyle factors that may be contributing to stress or hormonal imbalance. Regular exercise, a balanced diet, and stress management techniques such as yoga or meditation can be beneficial.

- Avoid Self-Diagnosis: While it is natural to seek information online, avoid self-diagnosing or self-treating without professional guidance. Each individual's situation is unique, and a healthcare provider can offer tailored advice.

In conclusion, while the delay in your menstruation can be concerning, it is often a temporary issue, especially following the use of emergency contraception. By staying in communication with your healthcare provider and monitoring your symptoms, you can work towards resolving this issue effectively.

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