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GDF9 and BMP15 expressed in human oocytes. Immunofluorescent analysis showing localization of (A-D) GDF9 and (E-H) BMP15 in the oocyte and cumulus cells of COCs from women with PCO. (A + E) GDF9/BMP15; (B + F) HSD17B1 showing cumulus-specific localization in the COCs; (C + G) DAPI nuclear staining; (D + H): merged images.
