MIF and endometriosis: When considering menstrual phase, for which both control groups were pooled, the best model [ICAM1, FST, oestradiol] gave 77% sensitivity at 80% specificity for detecting endometriosis in the proliferative phase, whilst the best model for secretory phase samples [CA125, MIF, PAEP], gave a sensitivity of 65% at 80% specificity.