Irregular Menstrual Cycles: Is 19 to 25 Days Normal?

Please ask again?

Hello, Doctor.
I previously asked you about the issue of anovulatory cycles and have received your response.
Thank you.
In your letter, you mentioned that if the cycle exceeds 21 days, it is considered a normal ovulatory menstrual cycle.
However, I sometimes experience cycles that are 19 days long (approximately 3 to 4 times a year) and other times 25 days long.
I have collected data over the past 5 years and found that both 19-day and 25-day cycles occur every year.
This seems to deviate from the average of 21-23 days.
Is this still considered normal? I apologize for bothering you again.
Thank you!

Xiao Yun, 20~29 year old female. Ask Date: 2004/02/06

Dr. Lü Lizheng reply Obstetrics and Gynecology

Hello! Indeed, not every menstrual cycle involves ovulation; as long as there are a few cycles with ovulation, pregnancy can occur without the necessity of ovulation in every cycle.
In fact, simply looking at the number of days in the menstrual cycle is not a precise way to determine if ovulation has occurred.
Other methods, such as measuring basal body temperature, blood tests for hormone levels, and ultrasound scans, are more accurate.
This is respectfully noted by Dr.
Lu Li-Cheng, Director of the Department of Obstetrics and Gynecology at Taoyuan Hospital, Ministry of Health and Welfare.

Reply Date: 2004/02/06

More Info

Understanding irregular menstrual cycles can be quite complex, and it's great that you're keeping track of your cycle data over the years. Based on the information you've provided, let's delve into the normalcy of your menstrual cycles, particularly focusing on the variations you've noted between 19 and 25 days.

Firstly, it's important to understand that menstrual cycles can vary significantly among individuals and even for the same individual over time. The average menstrual cycle is typically considered to be between 21 and 35 days, with the average being around 28 days. However, cycles that fall outside this range can still be considered normal, especially if they are consistent for you over time.

In your case, experiencing cycles that range from 19 to 25 days, while slightly shorter than the average, can still be within the realm of normalcy, particularly if this pattern has been consistent for you over the years. The key factors to consider are:
1. Consistency: If your cycles are consistently falling within the 19 to 25-day range and you are not experiencing any significant symptoms such as severe pain, heavy bleeding, or other concerning signs, this may simply be your body's natural rhythm.

2. Ovulation: You mentioned previously discussing anovulation (lack of ovulation). If you are experiencing regular cycles (even if they are shorter), it is possible that you are still ovulating. Ovulation can occur at different times in the cycle, and some women may have shorter luteal phases (the time between ovulation and the start of menstruation), which could explain the shorter cycles.

3. Hormonal Factors: Hormonal fluctuations can also impact the length of your menstrual cycle. Factors such as stress, diet, exercise, and overall health can influence your hormonal balance and, consequently, your menstrual cycle length.

4. Age and Life Stages: If you are in your late teens to early twenties, it is common for cycles to be irregular as your body is still adjusting to hormonal changes. Similarly, if you are approaching perimenopause, you may also notice changes in cycle length.

5. Medical Conditions: Conditions such as polycystic ovary syndrome (PCOS), thyroid disorders, or other hormonal imbalances can lead to irregular cycles. If you have concerns about these conditions or if you experience other symptoms (like weight changes, excessive hair growth, or acne), it may be worth discussing with your healthcare provider.

In conclusion, while your cycles of 19 to 25 days may seem irregular compared to the average, they can still be considered normal for you, especially if they are consistent and not accompanied by troubling symptoms. However, if you have concerns about your menstrual health or if there are significant changes in your cycle patterns, it is always a good idea to consult with a healthcare professional. They can provide personalized insights and, if necessary, conduct tests to rule out any underlying conditions. Keeping track of your cycles, as you have been doing, is an excellent practice that can provide valuable information for you and your healthcare provider.

Similar Q&A

Understanding Irregular Menstrual Cycles: Causes and Concerns

My menstrual cycle is approximately 25 to 26 days, but sometimes it occurs every 23 to 24 days, and this month it was only 22 days since the last one. Is this normal? What could be causing the shortening of the cycle?

Dr. Huang Jianxun reply Obstetrics and Gynecology
Hello: A menstrual cycle shorter than 21 days is considered abnormal, with the most common cause being hormonal imbalance. It is advisable to seek medical attention at a hospital. Wishing you peace and health. Sincerely, Dr. Huang Chien-Hsun, Director of the Department of Obstetr...

Understanding Irregular Menstrual Cycles: Frequency and Health Concerns

Hello Dr. Cheng, I would like to ask you a few questions: (1) During my middle school years, my menstrual cycle was approximately 23 days. After turning 20, it became regular at 26 to 28 days. However, in the past year, it has returned to a 23-day cycle. Each phase has been quit...

Dr. Li Guanghan reply Obstetrics and Gynecology
Hello: A menstrual cycle that is early or late by about a week is considered normal and is not related to menopause. Whether it affects the body depends on the amount of menstrual flow. Dr. Cheng Jin-He, Department of Obstetrics and Gynecology, Hsinchu Hospital.

Managing Irregular Menstruation: Tips for Improvement and Fertility Concerns

Hello Doctor, I have been experiencing irregular menstruation for twelve years, with an average cycle length of eighteen to twenty-two days. The first five days have a heavier flow (usually I need to use overnight pads in the morning). I have seen doctors during this time, but th...

Dr. Dong Yuhong reply Obstetrics and Gynecology
Hello: Based on your description, the condition of your menstruation can indeed be quite distressing, but without a medical examination, I cannot provide you with a definitive diagnosis. If you are willing, you can visit our obstetrics and gynecology department for treatment. If ...

Understanding Irregular Menstrual Cycles: Causes and Concerns

If your last menstrual period was from March 19 to March 23, and you experienced another period on April 8, just a short time later, it can be concerning. A menstrual cycle typically ranges from 21 to 35 days, so a 15-day interval between periods is shorter than average. There ...

Dr. Wu Xianghui reply Obstetrics and Gynecology
Abnormal bleeding and irregular menstrual cycles can have various underlying causes. It is recommended to consult a specialist in obstetrics and gynecology for evaluation.