卵子的

In addition, quantity and quality of eggs are just two factors affecting fertility.

卵子的数量与质量只是影响生育能力的两个因素。

The formation, development, and maturation of an ovum .

卵生成卵子的形成，发育和成熟

In human, ovulation occurs regularly for every 28 days. The maturation of the ovum

在人类，每隔28天排卵一次，随著卵子的成熟，子宫内壁慢慢充血和变厚

Union of sperm and egg in sexual reproduction.

有性生殖中精子和卵子的结合。

The union of the sperm and egg in sexual reproduction .

有性生殖中精子和卵子的结合。

The head of the sperm cell and the nucleus of the egg cell then unite and form a new cell: the zygote.

然后，精子的头和卵子的核融合，形成一个新细胞：受精卵。

Primordial germ cells were the progenitor cell of spermatozoon and ovum.

原始生殖细胞是精子和卵子的前体细胞。

A caplike structure at the anterior end of a spermatozoon that produces enzymes aiding in egg penetration .

精子头粒蛋白一种在精子内前端的帽状结构，可产生帮助穿透卵子的

Before this, media ever reported discovery of researcher of a college, the male can make after taking Wei elder brother the binding energy force of spermatozoon and ovum drops, bring about even infecund.

26rdquo；此前，媒体曾报道说一所大学研究人员发现，男性在服用伟哥后会使精子与卵子的结合能力下降，甚至导致不孕。

The results are as follows:(1)in testis tissue, the expression of RB gene only was found in spermatocytes and prespermatids of seminiferous tubule of immature mice and spermatids of mature mice, and it was not found in the spermatogonia, spermatognial stem cell and primary metamorphous sperm from both immature and mature mice.

这些结果表明，RB基因在小鼠精子和卵子的发生过程中有着重要作用

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。