When they reach the ovaries, they encourage the internal egg cells to grow and mature.

当它们到达卵巢后，会促进子卵巢内卵泡的发育和成熟。

The follicles are small clusters of granulosa and theca cells that protect the developing egg cell.

卵泡是由颗粒细胞、卵泡膜细胞组成的小簇，保护发育中的卵细胞。

Then, they turned the male mouse stem cells into female cells and produced functional egg cells.

然后，他们将雄性老鼠的干细胞转化为雌性细胞，并产生功能正常的卵细胞。

In parthenogenesis, an embryo develops from an unfertilized egg cell that doubles its own chromosome count.

在孤雌生殖中，胚胎由未受精的卵细胞在染色体数目翻倍后发育而来。

So an egg cell must be fertilized by a sperm cell to form two full sets of chromosomes.

因此，卵细胞必须由精子受精才能形成两套完整的染色体。

While only one egg cell is produced each month.

而每个月只产生一个卵细胞。

Then, the adult cell’s nucleus gets stuck into the egg cell essentially replacing the egg cell’s nucleus.

然后，成体细胞的细胞核卡在卵细胞中，基本上取代了卵细胞的细胞核。

And in its new home in the egg cell, it busts out all those instructions.

在它位于卵细胞的新家中， 它会执行所有这些指令。

For example, Archaefructus had modified leaves that surrounded its egg cells, forming what's called a carpel.

例如， Archaefructus 改变了包围其卵细胞的叶子，形成了所谓的心皮。

First, the female needs to be able to create egg cells without stimulation from sperm or mating.

首先，雌性需要能够在没有精子刺激或交配的情况下产生卵细胞。

Using electricity, they transferred the mammary gland cell's nucleus into an egg cell from a second sheep.

他们利用电将乳腺细胞的细胞核转移到第二只绵羊的卵细胞中。

It starts with an unfertilized egg cell, added to a blob of yolk, and squeezed down a stretchy tube called an oviduct.

它始于将未受精的卵细胞添加到一团卵黄并挤压一个称为输卵管的弹性管。

New research into mammal reproductions suggests that in principle it might be possible for humans to conceive children without an egg cell.

哺乳动物生殖领域的最新研究发现，大体来讲，人类可以在没有卵细胞的情况下繁育后代。

One approach is to combine the nuclear DNA from an affected egg cell with healthy mitochondria from another woman.

一种方法是将受影响卵细胞的核 DNA 与另一名女性的健康线粒体结合起来。

At this scale, Mars is a tiny 0.5 mm red dot, the same width of a human egg cell.

在这个比例下，火星是一个 0.5 毫米的小红点，与人类卵细胞的宽度相同。

The first time, they do this separately when they generate the gametes - that is, sperm and egg cells.

第一次是在牠们各自在造配子时重组─即是制造精子和卵子时。

Now, if an egg cell combines with any of these sperm cells that have the missing chromosome, then you get Turner syndrome.

现在，如果一个卵细胞与这些缺少染色体的精子细胞中的任意一个相结合，就会造成特纳综合征。

Instead, this fish managed to achieve true self-fertilization, using sperm and egg cells from the same organism.

相反，这种鱼设法实现了真正的自我受精，使用来自同一生物体的精子和卵细胞。

The egg cells grow and estrogen levels peak, inhibiting the production of FSH, and telling the pituitary to pump out more LH.

伴随着卵细胞的成长，雌性激素的分泌也将达到峰值，同时抑制促卵泡激素，促进垂体释放更多的黄体化激素。

This inner machinery includes two ovaries stocked with thousands of tiny sacks called follicles that each contain one oocyte, an unfertilized egg cell.

这套内部机制包含两个卵巢，卵巢内存有成千上万的微小袋子，叫做卵泡，每个卵泡内都含有一个卵母细胞，即未受精卵细胞。