Conclusion: GDF-9 is secreted in the early stage of ovary, and expressed consequently from then on.It suggests that oocyte may regulate the folliculogenesis with some factors like GDF-9.

• 结论：GDF-9在卵巢发育的早期即开始产生，以后在各阶段卵巢中持续表达，提示卵母细胞通过产生GDF-9等因子对卵泡的发育进行调节。