Growth differentiation factor 9 concentration in the follicular fluid of infertile women with endometriosis.

This study evaluated the level of growth differentiation factor 9 (GDF-9) in the follicular fluid of infertile women with endometriosis. The presence of GDF-9 in follicular fluid of preovulatory follicle was confirmed by Western blotting method in the band of 53 kDa, and GDF-9 concentration in women with severe endometriosis was lower than in those without.