在光镜下难以根据性原细胞的形态和大小区分卵原细胞和精原细胞。
It was difficult to distinguish oogonium from spermatogonium according to the shape and size of gonium under light microscope.
结果表明，不同发育时期的卵原细胞和卵母细胞中都存在雌激素、雄激素和孕激素受体。
The results indicated that the receptors of estrogen, androgen and progestogen existed in oogonia and oocytes of different developmental stages.
结果表明，不同发育时期的卵原细胞和卵母细胞中都存在雌激素、雄激素和孕激素受体。
The results indicated that the receptors of estrogen, androgen and progestogen existed in oogonia and oocytes of different developmental stages.
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