On the contrary, no dependence of miR-17-5p and miR-20a-5p levels in peripheral blood plasma on the age of the patients was found, and these two miRNAs were specific plasma markers of progesterone receptor-negative HGSOC (cluster 1), statistically significantly differentiating patients with this subtype of HGSOC from apparently healthy women and patients with other types of serous ovarian tumors or external genital endometriosis. The gene discussed is PGR; the disease is ovarian serous tumor.