The tiny oocyte moves along the fallopian tube.

微小的胞沿输管运动。

Meanwhile, the primordial follicle turns into a primary follicle, meaning that the follicular cells that surrounding the primary oocyte develop into granulosa cells.

与此同时，包围初级胞的滤泡胞分化为颗粒胞，使始基泡变为初级泡。

So next month Dr Tilly will take some of his stem cell booty to Edinburgh to collaborate with Evelyn Telfer, who has developed a technique for growing human eggs from an early stage.

所以，下月Tilly博士将带着胞去爱丁堡与Evelyn Telfer合作。Evelyn Telfer掌握了用胞培育胞的技术。

In fact, sometimes only a dozen or so of the original millions make it through all those trials to actually reach an oocyte.

事实上，有时候几百万胞中只有打左右通过了所有这些试验最终得到了胞。

Each primordial follicle has a single immature sex cell called the primary oocyte at the core, and a layer of follicular cells surrounds this.

每始基泡中心都有成熟的生殖胞，叫做初级胞，被泡胞包裹。

But for now, you learned all about female reproductive anatomy, how sex hormones affect oogenesis and ovulation, and how the ovarian and menstrual cycles mature and release oocytes, and create a comfy uterine environment for a fertilized egg.

但是现在，你了解了女性生殖解剖学，性激素如何影响子发生和排，巢和月经周期如何成熟和释放胞，并为受精创造舒适的子宫环境。

The first part is the fimbriae which are the finger-like projections that surround the ovary and guide the secondary oocyte into the fallopian tube.

首先经过的是输管的伞部，呈指状突起，包围着巢，并且可以引导次级胞进入输管。

That oocyte has a window of about a day, or less, to meet a sperm before it's no longer viable. But, that being said, sperm can persist in the female reproductive tract for as much as 3-5 days.

胞有大约天或更短的时间在精子不再存活之前与精子相遇。但是，话虽如此，精子可以在女性生殖道中持续 3-5 天。

If fertilization occurs - meaning if a sperm meets the secondary oocyte - then the corpus luteum continues making progesterone until the placenta forms.

如果这时候受精，精子遇到次级胞，黄体会持续地分泌黄体酮，直到胎盘形成。

They also prepare the uterus to receive the oocyte, which is now on its way down a fallopian tube, where it might meet a nice young sperm.

它们还准备子宫接收胞，胞现在正在输管中，在那里它可能会遇到好的年轻精子。

In a graafian follicle, a central cavity called the antrum forms within the follicle, and the granulosa cells secrete a nourishing fluid for the primary oocyte directly into that antrum.

格拉夫泡的中间会形成空腔叫做泡腔，而颗粒胞会为初级胞分泌营养液，直接排入泡腔。

The LH gets to work on the oocyte that's been dormant inside the follicle, and triggers it to finally start dividing again — getting it to complete meiosis I and move on to metaphase II.

LH 开始作用于泡内休眠的胞，并触发它最终再次开始分裂——让它完成减数分裂 I 并进入中期 II。

After ovulation, the secondary oocyte makes a very quick journey through the peritoneal space and lands in the fallopian tube.

排之后，次级胞会快速地通过腹膜，最后落入输管。

Remember that the " egg" is still just a secondary oocyte here, and hasn't completed meiosis. As the sperm delivers its payload, it causes a flash of calcium ions from the oocyte's endoplasmic reticulum.

请记住，“子”在这里仍然只是次级胞，还没有完成减数分裂。当精子传递其有效载荷时，它会从胞的内质网中产生钙离子闪光。

To do this, the primary oocytes have to complete meiosis 1, and in a person's lifetime only about 400 successfully do that.

要变成配子就必须要经历第次减数分裂，而人的生中大概只有400初级胞可以做到。

Once it's past that, it runs into the zona pellucida, a layer of glycoprotein that covers the oocyte's plasma membrane.

旦过了这阶段，它就进入透明带，覆盖胞质膜的层糖蛋白。

The ovaries contain follicles, which contain oocytes, which are immature eggs and surrounding cells.

巢中含有泡，泡中包含胞，这是成熟的子及其周围的胞。

Over time, staying in that frozen state of miosis gradually means there's more and more possibility of poor egg quality, meaning when they do start cell division again, they have a higher chance of making mistakes in that process.

随着时间推移， 胞长期处于这种停滞的减数分裂状态， 逐渐意味着子质量下降的可能性越来越大，这意味着当它们再次开始胞分裂时，在此过程中出错的几率更高。

So some of her ovocytes were carrying her own genetic signature, and some of the ovocytes were carrying her sister's genetic signatures.

因此，她的些胞携带了她自己的遗传特征，而另些胞则携带了她姐妹的遗传特征。

If fertilization doesn't happen, then the corpus luteum stops making hormones after around 10 days, becomes fibrotic, and is called the corpus albicans.

如果次级胞没有受精，大概10天之后，黄体就会停止释放激素而纤维化，形成白体。