Methods of screening a bodily sample for endometriosis are provided. The bodily sample is preferably saliva. According to one embodied method, the bodily sample is subjected to a denaturing procedure, and a property of the bodily sample observed after the denaturing procedure is evaluated for the presence or absence of a factor correlating to endometriosis as part of an endometriosis screening procedure. The methods embodied herein are preferably conducted in combinations which permit for the evaluation of at least two different physiological factors correlating to endometriosis, because women with endometriosis do not always share the same factors. Also provided are screening kits, assay methods, and systems for endometriosis screening.