Growth differentiation factor 9 (GDF-9) gene is a growth factor secreted by oocytes in growthing ovarian follicles, which is essential for normal follicular development.

　
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  • 生長(cháng)分化因子9(GDF-9)基因是由卵母細胞分泌的一種生長(cháng)因子，它對早期卵泡的生長(cháng)和分化起著(zhù)重要的作用。
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