Menstrual blood is more than just blood. It also contains uterine lining (endometrial tissue), mucus, and other fluids that are shed during menstruation.
As your uterus sheds its lining, your body releases natural anticoagulants that help keep menstrual blood flowing. However, if your bleeding is especially heavy, your body may not produce these anticoagulants quickly enough to prevent clotting. As a result, some blood forms clots before leaving the uterus.
Period blood clots may appear:
- Bright or dark red
- Jelly-like or thick in texture
- About the size of a dime or quarter
- Occasionally larger during heavier flow days
Passing an occasional blood clot, particularly during the first day or two of your period, is common for many women.
When Are Period Blood Clots Considered Normal?
Small blood clots are usually not a cause for concern if they occur during a heavier menstrual flow and are not accompanied by other symptoms.
Blood clots are generally considered normal if they:
- Occur only during your menstrual period
- Are smaller than about the size of a quarter
- Appear on your heaviest flow days
- Occur only occasionally
Every person’s menstrual cycle is different, so what is considered “normal” can vary. The important thing is to pay attention to changes in your usual menstrual pattern.
When Should You Be Concerned About Blood Clots?
While menstrual blood clots alone don’t necessarily indicate a problem, they can sometimes be a sign of heavy menstrual bleeding or an underlying gynecologic condition.
Schedule an appointment with your healthcare provider if you experience:
- Frequent blood clots larger than a quarter
- Bleeding that soaks through a pad or tampon every hour for two or more hours
- Periods lasting longer than seven days
- Severe pelvic pain or cramping
- Bleeding between periods
- Fatigue, dizziness, or symptoms of anemia
- A sudden change in your menstrual flow
These symptoms may require further evaluation to determine the underlying cause. Your OBGYN can help identify what’s causing your symptoms and recommend an appropriate treatment plan.
What Conditions Can Cause Large Blood Clots During Your Period?
Several conditions can contribute to heavier menstrual bleeding and larger blood clots, including:
Uterine Fibroids
Fibroids are noncancerous growths that develop within or on the uterus. Depending on their size and location, they can cause:
- Heavy menstrual bleeding
- Large blood clots
- Pelvic pressure
- Frequent urination
- Pain during menstruation
Adenomyosis
Adenomyosis occurs when tissue similar to the uterine lining grows into the muscular wall of the uterus. This condition often causes heavy, painful periods and increased clotting.
Hormonal Imbalances
Hormones regulate the buildup and shedding of the uterine lining. Conditions that affect hormone levels, such as polycystic ovary syndrome (PCOS), perimenopause, or thyroid disorders, can sometimes lead to heavier periods.
Bleeding Disorders
Less commonly, inherited bleeding disorders or certain medications that affect blood clotting may contribute to unusually heavy menstrual bleeding.
Pregnancy-Related Causes
Heavy bleeding with blood clots during pregnancy or shortly after a positive pregnancy test should always be evaluated promptly, as it could indicate a miscarriage or another pregnancy-related complication.
How Are Heavy Periods and Blood Clots Evaluated?
If you’re experiencing unusually heavy bleeding, your healthcare provider will review your symptoms, menstrual history, and overall health.
Depending on your situation, they may recommend:
- A pelvic exam
- Blood tests to check for anemia or hormone imbalances
- A pelvic ultrasound
- Additional imaging or diagnostic procedures if needed
These evaluations help identify the cause of your symptoms and guide the most appropriate treatment recommendations.
What Treatments Are Available?
Treatment depends on the underlying cause of your heavy menstrual bleeding.
Options may include:
- Hormonal birth control
- Hormonal IUDs
- Non-hormonal medications to reduce menstrual bleeding
- Treatment for underlying hormone conditions
- Minimally invasive procedures for fibroids or other uterine conditions
- Surgery in select cases
Many women experience significant relief once the underlying cause has been identified and treated.
Don’t Ignore Changes in Your Menstrual Cycle
Occasional blood clots during your period are often completely normal, especially during heavy flow days. However, if you’re passing large clots frequently or experiencing unusually heavy bleeding, it’s important to discuss your symptoms with your healthcare provider.
Early evaluation can help identify underlying conditions and provide effective treatment options, allowing you to manage your periods more comfortably while protecting your long-term reproductive health.
Call (913) 384-4990 or schedule an appointment online today.