Endometriosis is a condition that can take years to diagnose, but startups are working to change this. Various approaches are being explored, including the use of menstrual blood, saliva tests, and new medical devices such as "smart" menstrual cups. The development of these new diagnostic tools may potentially significantly reduce the time it takes to diagnose endometriosis, with one startup claiming to have created a saliva test that can diagnose the condition in as little as ten days.