Bleeding disorders are conditions where blood does not clot properly, leading to prolonged or excessive bleeding from injuries or spontaneous bleeding episodes. These disorders are caused by deficiencies in clotting factors like fibrinogen, von Willebrand factor, or platelets, which can be inherited (such as hemophilia) or acquired through liver disease, medication use, or autoimmune conditions. The Fibrinogen Activity test is the most important test for diagnosing bleeding disorders because it measures how effectively your blood forms clots.
90-day money-back guarantee
Lab order in minutes
Save a trip to the doctor
Low prices since 2005
Labs within 2 miles
Bleeding disorders are caused by deficiencies or dysfunction in blood clotting components including clotting factors (like Factor VIII in hemophilia A, Factor IX in hemophilia B, or fibrinogen), platelets, or von Willebrand factor. Inherited bleeding disorders result from genetic mutations passed down through families, while acquired bleeding disorders develop from conditions like liver disease (which produces clotting factors), vitamin K deficiency, autoimmune diseases that destroy platelets, or medications like blood thinners and aspirin. Some bleeding disorders occur when the bone marrow fails to produce adequate platelets or when the body mistakenly attacks its own clotting factors.
The Fibrinogen Activity test is the most important test for bleeding disorders because it measures how effectively fibrinogen converts to fibrin during clot formation using the Clauss method, which directly assesses your blood's ability to stop bleeding. Low fibrinogen activity levels indicate slower clot formation and increased bleeding risk, helping identify both inherited conditions like afibrinogenemia and acquired problems from liver disease or excessive bleeding. This test is typically ordered alongside a Complete Blood Count to check platelet levels, Prothrombin Time (PT) to measure clotting speed, and Partial Thromboplastin Time (PTT) to evaluate specific clotting factor deficiencies, creating a comprehensive picture of your clotting system.
You should get tested if you experience unexplained bruising that appears without injury, frequent nosebleeds lasting more than 10 minutes, heavy menstrual periods requiring pad changes every hour, prolonged bleeding from minor cuts that continues for more than 15 minutes, or bleeding gums during routine brushing. Testing is especially important before surgery or dental procedures if you have a family history of bleeding disorders, if you notice blood in your urine or stool, or if you develop joint swelling and pain from internal bleeding. Early diagnosis helps prevent complications and ensures proper precautions during medical procedures.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
What this means
Your testosterone levels are slightly below the optimal range. While this is not necessarily cause for concern, it may contribute to occasional fatigue, reduced motivation, or lower muscle mass over time.
Recommended actions
Increase resistance or strength training
Prioritize 7–8 hours of quality sleep per night, try to reduce stress
Include more zinc- and magnesium-rich foods (like shellfish, beef, pumpkin seeds, spinach)
Consider retesting in 3–6 months
Not overhyped or overpriced. Just comprehensive blood testing made simple and for everyone.
505 reviews
Sample results
Your 24/7 Lab Guide
Quick questions:
