受精卵;
The ovum passes into the fallopianuterinetube , and will degenerate if not fertilized within about 24 hours.
如果卵子排出后约24小时内未能受精就将退化.
The spherical embryonic mass of blastomeres formed before and resulting from cleavage of the fertilized ovum.
桑椹胚形成于''.'囊'.''胚之前且处于胚胎''.'期'. ''内的球形裂球群,由受精卵细胞的分裂而成.
One way is taking the cell from a fertilized ovum.
一种方法是从受精卵中取出细胞.
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