Delayed Menstruation: Causes and Concerns for Women - Obstetrics and Gynecology

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Menstrual delay


Hello, doctor.
I had sexual intercourse with my boyfriend at the beginning of March, and my period started on March 25 and ended on March 30.
Since that sexual encounter, I have been too anxious to engage in sexual activity again.
After my period, I have only been using my hands with lubricant inside my vagina.
However, my period was supposed to come on April 25, but it still hasn't arrived by early May.
Could this be a case of menstrual irregularity or pregnancy? Additionally, I took a pregnancy test on May 2, and it showed one line.

Y, 20~29 year old female. Ask Date: 2020/05/04

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, it seems you are not pregnant.
Wait another week, and if your period still hasn't arrived, it is advisable to see a gynecologist.
Wishing you good health.

Reply Date: 2020/05/04

More Info


Delayed menstruation can be a source of concern for many women, especially when it occurs unexpectedly. In your case, you mentioned that your last menstrual period started on March 25 and ended on March 30, with your next expected period around April 25. However, as of early May, you have not yet experienced menstruation. Given that you have engaged in sexual activity, it is understandable to be concerned about the possibility of pregnancy.

First and foremost, it is important to note that a missed period can be attributed to various factors, and pregnancy is just one of them. Since you mentioned that you had sexual intercourse in early March and used a pregnancy test on May 2 that showed one line (indicating a negative result), it is unlikely that you are pregnant. Home pregnancy tests are generally reliable when used correctly and after a missed period. However, if you are still concerned, it may be beneficial to consult with a healthcare provider for a more definitive test.

There are several potential causes for delayed menstruation aside from pregnancy:
1. Stress: Emotional and physical stress can significantly impact your menstrual cycle. Stress triggers the release of hormones that can interfere with the normal functioning of the hypothalamus, which regulates the menstrual cycle.

2. Hormonal Imbalances: Conditions such as polycystic ovary syndrome (PCOS) or thyroid disorders can lead to irregularities in your menstrual cycle. Hormonal fluctuations can cause your body to skip periods or delay them.

3. Changes in Weight: Significant weight loss or gain can also affect your menstrual cycle. The body requires a certain amount of body fat to maintain regular ovulation and menstruation.

4. Lifestyle Changes: Changes in your daily routine, such as alterations in diet, exercise, or sleep patterns, can influence your menstrual cycle. For instance, increased physical activity or changes in your diet can lead to missed periods.

5. Medical Conditions: Certain medical conditions, such as diabetes or other chronic illnesses, can also affect your menstrual cycle.

6. Medications: Some medications, including hormonal contraceptives, can alter your menstrual cycle. If you have recently started or stopped any medications, this could be a contributing factor.

Given your situation, it would be advisable to monitor your menstrual cycle over the next few months. If your period does not return or if you experience other concerning symptoms, such as severe pain or unusual discharge, seeking medical advice would be prudent. A healthcare provider can conduct a thorough evaluation, which may include blood tests to check hormone levels or imaging studies to assess your reproductive organs.

In summary, while a missed period can be alarming, it is essential to consider the various factors that can contribute to this occurrence. Since your pregnancy test was negative, it is likely that other factors, such as stress or hormonal changes, are at play. Keeping track of your menstrual cycle and any accompanying symptoms will provide valuable information for you and your healthcare provider in determining the next steps.

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