Irregular Menstruation: Causes and Treatment Options - Obstetrics and Gynecology

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Menstrual irregularities


Hello Doctor, my menstrual cycle has been irregular for a while.
In the past two years, my menstrual flow has decreased significantly, usually lasting only two days, but the cycle is quite regular, mostly around 26 days.
I previously went to the hospital for a blood test to check for polycystic ovary syndrome (PCOS), but the results were normal.
Recently, I've noticed an increase in hair growth around my areolas and on my breasts, with some hairs growing as long as 7 to 8 centimeters.
Could this still be a sign of PCOS? Additionally, I read online that birth control pills can help regulate menstruation.
If I take the pills, will the hair continue to grow, or will it fall out naturally? When I visited the hospital before, the doctor mentioned that if I am not planning to get pregnant, I don't need to worry since my cycle is regular.
However, I'm concerned about the ongoing hair growth on my chest, so I would like to ask for your advice.
Thank you, Doctor.

Dìguā, 20~29 year old female. Ask Date: 2022/07/01

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, your menstrual cycle should not be irregular like this.
You might consider taking birth control pills to see if it improves.
Wishing you good health.

Reply Date: 2022/07/01

More Info


Irregular menstruation can be a complex issue with various underlying causes, and it often requires a thorough evaluation to determine the most appropriate treatment options. Based on your description, it seems you are experiencing changes in your menstrual cycle, including a decrease in flow and the presence of excessive hair growth, which could indicate a hormonal imbalance.

One of the most common causes of irregular menstruation is Polycystic Ovary Syndrome (PCOS), which is characterized by hormonal imbalances that can lead to irregular periods, excess hair growth (hirsutism), and other symptoms. Although your blood tests did not indicate PCOS, it is important to note that the diagnosis can sometimes be missed, especially if the symptoms are mild or if the testing was not comprehensive. The presence of excessive hair growth, particularly in areas typically associated with male-pattern hair growth, can be a sign of elevated androgen levels, which are often seen in PCOS.

Regarding your question about the use of birth control pills to regulate your menstrual cycle, hormonal contraceptives can indeed help manage irregular periods and reduce hirsutism. Birth control pills work by providing a steady level of hormones that can help regulate your menstrual cycle and reduce the production of androgens, which may lead to a decrease in hair growth over time. However, it is important to understand that while birth control pills can help manage symptoms, they do not cure the underlying condition. If you stop taking the pills, your symptoms may return.

As for the hair growth you are experiencing, it is possible that some of the hair may naturally fall out over time once you start taking hormonal contraceptives, but this can vary from person to person. In some cases, additional treatments may be necessary to address hirsutism, such as anti-androgen medications (like spironolactone) or cosmetic procedures (like laser hair removal) to achieve more permanent results.

It is also worth noting that if you are not planning to become pregnant, it may be beneficial to address your concerns with a healthcare provider who specializes in hormonal disorders or reproductive health. They can provide a more comprehensive evaluation, including a detailed history, physical examination, and possibly further testing to rule out other conditions that could be contributing to your symptoms.

In summary, irregular menstruation and excessive hair growth can be indicative of hormonal imbalances, such as those seen in PCOS. Birth control pills can be an effective treatment option for regulating your cycle and managing hirsutism, but it is essential to have a thorough discussion with your healthcare provider to determine the best course of action tailored to your specific situation. Regular follow-ups and monitoring may also be necessary to ensure that your treatment plan remains effective and to address any new symptoms that may arise.

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