In the groups with extragenital endometriosis (group 5) and umbilical endometriosis (group 6), a decrease of 10–12% in the relative content of protein and mRNA of alpha-tubulin (Figure 4A,B) and beta-tubulin (Figure 4C,D) was observed (p < 0.05) in each case. This evidence concerns the gene TUBA1B and endometriosis.