成体鲎血细胞发生于与生殖细胞发生相邻部位的结缔组织，其间以基膜为界。
Haemocytopoiesis occurred in connective tissues adjacent to the site of gametogenesis with basement membrane as a boundary between them.
然而由于缺乏可重复、高效率研究雄性配子发生的体外培养体系，生殖细胞发生、发育机制研究进展缓慢。
However, for lack of an efficient and reproducible model, the mechanism of male germ development is not yet clear.
结论卵巢内胚窦瘤的发生率在中国各类型卵巢恶性生殖细胞瘤中位居首位。
Conclusions the endodermal sinus tumor of the ovary stands first in the incidence of malignant germ cell tumors of the ovary in China.
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