Can menstrual blood tests diagnose endometriosis?

Testing menstrual fluid (menstrual effluent) for cellular material, proteins, or microRNAs is an exciting research direction for identifying endometriosis without surgery. These approaches aim to detect biological “signals” associated with the disease using what’s naturally shed during a period.

Right now, menstrual-blood-based tests are not validated or widely available for routine clinical diagnosis, and they shouldn’t be used as a stand-alone answer. In our practice, diagnosing and mapping suspected endometriosis still relies on your symptom pattern, a detailed history and exam, and targeted imaging when appropriate. If you’re exploring testing options and want clarity on what’s available today—and what it can and can’t tell you—our team can help you plan a thoughtful diagnostic path and discuss next steps.