Changes in Menstrual Cycle: Is Your Period Normal? - Obstetrics and Gynecology

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Menstrual duration


Hello, Doctor: My menstrual cycle has not been very regular in the first three months of this year, typically arriving about a week late.
Additionally, I have noticed that the duration of my period has increased from the usual 4-5 days to 8-9 days (from the start to the end).
Is this normal? In the past, my periods were not very long, but recently I have been feeling that the duration has been extending.
I even visited a doctor in January due to irregular menstruation, and the ultrasound showed no issues.
Could you please help me understand this? Thank you!

Xiao Mama, 20~29 year old female. Ask Date: 2006/05/18

Dr. Zhuang Zhijian reply Obstetrics and Gynecology


According to what you mentioned, the ultrasound examination showed no issues, so we should consider the possibility of ovarian function being a factor.
It is recommended that you measure your basal body temperature yourself and keep a continuous record to bring to the hospital for the physician's reference.
You can purchase a "women's basal thermometer" at the pharmacy, which will include a blank chart.
It is advisable to make a photocopy of it for your records, so you can continue to document your measurements.

Reply Date: 2006/05/18

More Info


Changes in the menstrual cycle can be concerning, especially when they deviate from what is considered normal for you. Based on your description, it seems that you have experienced a significant alteration in your menstrual pattern over the past few months. Specifically, you mentioned that your periods have become irregular, arriving about a week late, and the duration has increased from the typical 4-5 days to 8-9 days.
Firstly, it’s important to understand that menstrual cycles can be influenced by a variety of factors, including hormonal changes, stress, lifestyle modifications, weight fluctuations, and underlying health conditions. Irregularities in the menstrual cycle are not uncommon, especially during transitional phases of life, such as adolescence, perimenopause, or after significant life events.
In your case, since you have already consulted a doctor and had an ultrasound that showed no abnormalities, it is a positive sign that there are no immediate concerns regarding structural issues in the reproductive system. However, the changes you are experiencing could still be attributed to hormonal imbalances. Conditions such as polycystic ovary syndrome (PCOS), thyroid disorders, or even stress-related factors can lead to irregular cycles and changes in menstrual flow.

It’s also worth noting that lifestyle factors can play a significant role in menstrual health. For instance, changes in diet, exercise habits, and stress levels can all impact hormonal balance. If you have recently experienced changes in your weight or have been under increased stress, these could be contributing factors to your irregular cycles.

Regarding the duration of your periods, an increase from 4-5 days to 8-9 days is considered prolonged. Menorrhagia, or heavy menstrual bleeding, can be caused by various factors, including hormonal imbalances, fibroids, or other uterine conditions. If the bleeding is excessively heavy or accompanied by severe pain, it would be advisable to seek further evaluation.

In terms of what is considered "normal," menstrual cycles can vary widely among individuals. A typical cycle ranges from 21 to 35 days, and the duration of bleeding can last from 2 to 7 days. However, what is most important is what is normal for you. If you notice significant changes that persist over several cycles, it is essential to follow up with your healthcare provider.

To address your concerns, I recommend keeping a menstrual diary to track your cycles, noting the start and end dates, flow intensity, and any accompanying symptoms such as pain or mood changes. This information can be invaluable for your healthcare provider in determining the underlying cause of your irregularities.

If your irregular cycles continue or if you experience any other concerning symptoms, such as severe pain, excessive bleeding, or signs of anemia (like fatigue or dizziness), it would be prudent to return to your healthcare provider for further evaluation. They may consider additional tests, such as blood tests to check hormone levels or a more detailed examination of your reproductive health.

In summary, while changes in your menstrual cycle can be concerning, they are not uncommon. Given that you have already sought medical advice and have had an ultrasound with normal results, it may be beneficial to monitor your cycles closely and maintain open communication with your healthcare provider regarding any further changes or symptoms.

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