求助文献：Growth differentiation factor-9 is required during early ovarian

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求助文献一篇：
: u( x7 d4 X4 a- O    title： Growth differentiation factor-9 is required during early ovarian folliculogenesis。- Y" z; u: b4 P7 I2 C+ F6 o5 Z. b6 B
             Nature 383, 531-535 (10 October 1996)
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