Difficulty in obtaining an accurate diagnosis and treatment for endometriosis leaves many women spitting mad, but they may soon find that saliva is the key to escaping the diagnostic maze. A recent study published in the New England Journal of Medicine validated the Endotest developed by Ziwig SAS based on results from a study involving 200 symptomatic patients monitored in five hospital units and specialized centers in France since November 2021. The findings demonstrated a sensitivity and specificity of more than 95%.