Quantitative analysis of IAPs mRNA expression in human endometrial and endometriotic tissues. The mRNA levels of c-IAP1, c-IAP2, XIAP and Survivin were evaluated by real-time RT–PCR. The abbreviations of the four types of tissues are as follows: (i) eutopic endometrial tissues, disease-free patients: F-Em (n = 16); (ii) with uterine myomas: M-Em (n = 16); (iii) with ovarian chocolate cyst: C-Em (n = 16); and (iv) the ovarian chocolate cyst: C (n = 16). The mRNA level of F-Em (proliferative phase) was set arbitrarily at 1.0. P, proliferative phase; S, secretory phase. Data are the mean ± SEM of three independent experiments. Results were analyzed using one-way ANOVA followed by Fisher's protected least significant differences post hoc test. Bars that do not share a letter are significantly different (P < 0.05).