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.
One way is taking the cell from a fertilized ovum.
一种方法是从受精卵中取出细胞.
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.
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