It can be done before birth via chorionic-villus sampling or amniocentesis.

它以在出生前通过-取样或羊穿刺术完成。

This can also be done prenatally by testing fetal DNA obtained through either chorionic villus sampling or amniocentesis.

这以在产前通过检测胎儿DNA完成，如取样或羊穿刺术。

These tumors are usually small, bleed easily, and often spread beyond the ovaries.

癌往往比较小，但容易出血，且常常播散到卵巢以外。

You have a dizygotic dichorionic diamniotic pregnancy.

您患有双卵双双羊水妊娠。

These are caused by overstimulation by human chorionic gonadotropin or hCG, a hormone that's produced by the placenta, so they're only seen in pregnancy.

这是由人促性腺激素（hCG）过度刺激导的；这种激素由胎盘释放，因此仅见于怀孕期间。

So, for example, a pinealoma may lead to increased secretion of the hormone beta human chorionic gonadotropin that can cause an early onset of puberty.

比如，松果能导β人促性腺激素分泌增加，引起青春期发育提前。

The third subtype is a choriocarcinoma and it's made of germ cells that turn into syncytiotrophoblast cells which are the ones that help form the placenta.

第三种亚型是癌，它是由转化成合滋养细胞的生殖细胞组成，合滋养细胞帮助形成胎盘。

The fetal layer of the placenta on the other hand is called the chorion, which is a tissue that has fingerlike projections called chorionic villi which contain tiny fetal arterioles and venules.

胎盘的“胎儿层”也被称为；这是一种有这种手指状突起的组织，富含微小的胎儿动脉和静脉。

But the placenta -- the organ that provides material to the embryo from the mother -- is actually formed from the chorion and allantois membranes of the egg.

但是胎盘——为母亲的胚胎提供物质的器官——实际上是由卵子的和尿囊形成的。

Because, the main membranes of an amniotic egg -- known as the sac, the chorion, and the allantois -- are all present in animals that give birth to live young.

因为，羊卵的主要——被称为囊、和尿囊——都存在于生下活幼仔的动物身上。

They began to notice a pattern of fluctuations throughout a woman's 28 day menstrual cycle and saw a sharp spike in the level of HCG (human chorionic gonadotropin) in pregnant women, and nowhere else.

他们开始注意到女性28天的月经周期中有一种波动模式，孕妇的 HCG（人促性腺激素）水平急剧上升，而其他人则不会。

Her belly is pretty big, so it's harder sometimes to know those things, unless you are able to see what we call the chorion, which is the separation between the two sacs.

她的肚子很大， 所以有时很难知道这些东西，除非你能看到我们所说的，也就是两个囊之间的分隔。

The four major types of germ cell tumors are: fetal teratomas, both mature cystic and immature teratomas; yolk sac tumors, or endodermal sinus tumor, choriocarcinoma or placental tissue tumors and finally dysgerminomas or oocyte tumors.

4种卵巢细胞癌如下：畸胎，包括成熟囊性畸胎和未成熟畸胎；卵黄囊，又叫内胚窦；癌，又叫胎盘组织肿；最后是无性细胞，又叫卵母细胞。

AFP, though, can be elevated by other conditions as well, so in order to get a more exact diagnosis, additional blood tests for human chorionic gonadotropin, or HCG, inhibin A, and estriol, as well as an ultrasound are usually done.

但甲胎蛋白也会由于不少其它原因而升高，所以为了得到更准确的诊断，还需检查人促性腺激素（HCG）、抑制素A、雌三醇水平，或作超声检查。