(A) Detection on the expression of PTEN mRNA in normal ovarian tissue and ovarian cancer tissues with different clinical stages by qRT-PCR; (B) Detection on the expression of miR-25 in normal ovarian tissue and ovarian cancer tissues with different clinical stages by qRT-PCR; (C) Detection on the expression of PTEN proteins in normal ovarian tissue and ovarian cancer tissues with different clinical stages by Western blot.