Menstrual Blood Clots: Causes and Concerns for Women - Obstetrics and Gynecology

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Heavy menstrual blood clots?


Hello, Question 1: In recent years, I have experienced an increase in blood clots and a decrease in menstrual flow, with the duration changing from 7 days to 3 or 4 days.
My menstrual cycle is consistently 32 to 35 days.
Last year, I consulted both a gynecologist at a clinic and a large hospital, and ultrasounds showed no abnormalities.
I also had a Pap smear in late November last year, which was normal.
Why is this happening? Question 2: Why do I experience bloating in my gastrointestinal tract before and after my period or during ovulation? Question 3: Last week, I visited a clinic regarding the issue of increased blood clots.
The doctor noted that the right side of my uterus appeared swollen, but I did not understand the explanation.
Why would it be swollen if I have no pain or other symptoms?

Giank, 20~29 year old female. Ask Date: 2016/07/24

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, your ultrasound should be normal.
Having a menstrual period lasting 3 to 4 days is acceptable, but since you mentioned there are many blood clots, it could be due to poor uterine contractions.
You might consider trying uterotonics.
Wishing you good health.

Reply Date: 2016/07/24

More Info


Understanding menstrual blood clots and associated concerns is a common issue for many women. Let's break down your questions and provide some insights based on medical knowledge.


Question 1: Why are there more blood clots and less menstrual flow?
Experiencing an increase in blood clots during menstruation while noticing a decrease in overall menstrual flow can be perplexing. Blood clots during menstruation are typically a result of the body’s natural processes. When menstrual blood flows too slowly through the uterus, it can begin to clot. This can happen for several reasons, including hormonal imbalances, uterine fibroids, or polyps.
In your case, since you've had ultrasounds and Pap smears that returned normal results, it’s less likely that there are significant structural issues like fibroids or polyps. Hormonal fluctuations, particularly involving estrogen and progesterone, can lead to changes in menstrual flow and clotting. For instance, if there is an imbalance where estrogen levels are higher relative to progesterone, it can lead to a thicker uterine lining, which may shed in larger pieces, resulting in clots.

It’s also worth noting that menstrual flow can vary significantly from cycle to cycle due to stress, diet, exercise, and other lifestyle factors. If your menstrual cycles are stable at 32-35 days, this is generally a good sign, but the changes in flow and clotting should still be monitored. If the clots are larger than a quarter or if you experience significant pain or other concerning symptoms, it would be prudent to follow up with your healthcare provider.


Question 2: Why do I experience bloating around my menstrual cycle or ovulation?
Bloating around your menstrual cycle or during ovulation is quite common and can be attributed to hormonal changes. During the menstrual cycle, estrogen and progesterone levels fluctuate, which can affect the gastrointestinal system.
Estrogen can cause the body to retain water, leading to a feeling of fullness or bloating. Additionally, progesterone can slow down digestion, which may also contribute to bloating and discomfort. This is often referred to as premenstrual syndrome (PMS) and can include a variety of symptoms such as bloating, mood swings, and breast tenderness.

If bloating is severe or accompanied by other symptoms like pain, changes in bowel habits, or significant weight gain, it would be wise to consult a healthcare provider to rule out any underlying conditions.


Question 3: What does it mean if my ultrasound shows a swollen area in the uterus?
If an ultrasound has indicated a "swollen" area in the uterus, it’s essential to understand what that means in the context of your overall health. A swollen area could refer to various conditions, including fibroids, adenomyosis, or even a thickened endometrial lining.
Since you mentioned that you are asymptomatic (no pain or other symptoms), it may not be a cause for immediate concern. However, it’s crucial to have a clear understanding of what the doctor meant by "swollen." It would be beneficial to ask for clarification on the ultrasound findings. If it’s a fibroid, for example, many women live with fibroids without any issues. If it’s a thickened endometrial lining, it may require monitoring, especially if you have irregular bleeding or other symptoms.

In summary, while menstrual blood clots and associated symptoms can be concerning, many factors contribute to these experiences. Regular follow-ups with your healthcare provider, maintaining a healthy lifestyle, and being aware of your body’s changes are vital steps in managing your menstrual health. If you have ongoing concerns, don’t hesitate to seek further evaluation or a second opinion for peace of mind.

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