PCR amplification from endometrium cDNA of women without (Normal) and with endometriosis using primers for bax (334-bp) and 18S rRNA (192-bp). Representative gel is shown. Graph illustrates the corresponding amplification relative to 18S rRNA (192-bp) and the results are given as mean ± SEM from 5 and 5 proliferative (P); 6 and 5 early secretory (ES); 5 and 6 mid secretory (MS) and 4 late secretory (LS) eutopic endometria obtained from women without (normal) and with endometriosis, respectively. (-) PCR amplification without template. *p < 0.05 vs. normal endometria. #p < 0.05 vs. proliferative phase.