The embryo engages in a complex, exquisitely timed hormonal dialogue that transforms the endometrium to allow implantation.

胚胎向子宫内膜传递 复杂而精细的激素信号，使子宫内膜允许它着床。

The endometrium evolved to make implantation difficult

子宫内膜不断演化 使得着床变得困难。

The endometrium evolved to make implantation difficult so that only the healthy embryos could survive.

子宫内膜经过演化， 使得着床难以进行因此，只有健康的胚胎能够生存。

If fertilization doesn't occur, the spiral arteries collapse, and the superficial layers of the endometrium die.

如果卵子没有受精，螺旋动脉将会收缩，子宫内膜的表层也会因此凋亡。

One hypothesis is that the placenta implants lower down when the endometrium in the upper uterus is not well vascularized.

一个假说认为胎盘附着于子宫底部的原因是顶部的子宫内膜没有得到良好的血供。

Additionally, spiral arteries emerge to nourish the growing functional endometrium.

此外，螺旋动脉出现以供养生长中的子宫内膜功能层。

Because they're functionally the same as the endometrium inside the uterus, endometriomas respond to hormones just like the uterus would.

由于它们具有和正常子宫内膜一样的功能，子宫内膜异位症囊肿也会和子宫一样，对激素有应答。

There, it requires another three or so days to implant firmly into the endometrium, the inner lining of the uterus.

在那里，还需要三天左右的时间才能牢固地植入子宫内膜，即子宫的内层。

So having high levels of estrogen will cause the endometrium undergoes hyperplasia, leading to increased risk of developing type 1 endometrial carcinoma.

因此，高水平的雌激素会导致子宫内膜增生，从而增加I型子宫内膜癌的风险。

Well, I got called into a room once to a quick vaginal exam and I'm like, yup, that would be the endometrium.

好吧，有一次我被叫进一个房间进行快速阴道检查，我想，是的，那就是子宫内膜。