Of all placental mammals, handicaps are the tiniest in comparison to their mother.

在所有盘哺乳动物中，与母亲相比，残疾最小。

This is our best guess at what the first placental mammal looked like.

这对第一种生哺乳动物外貌最好猜想了。

It's then carefully removed to ensure that there are no placental remnants left in the uterus.

然后慢慢移除，确保盘遗留物不会留在宫腔。

Therefore, you need to get your oxygen from the mother's placental blood flow and all that stuff.

因此，你需要从母亲盘血流和所有东西中获得氧气。

Tissue refers to placental fragments retained in the uterine cavity.

Tissue盘组织部分残留在子宫腔中。

Given that placental abruption leads to a serious blood loss from large vessels, it's considered an emergency.

如果盘早剥导致大血管严重出血，被认为紧急情况。

Apparently, her fall caused a placental abruption, where the placenta separates from the uterus. -Oh, my god.

很明显，她跌倒导致盘，盘和子宫已经分离了。-天哪。

But you have an early placental abruption.

但你过早出现了盘早期剥离。

But in 1960, many experts believed that the placental barrier shielded a fetus from harm.

但在 1960 年，许多专家认为盘屏障可以保护儿免受伤害。

The three modern mammal groups -- the placentals, marsupials and monotremes -- all made it.

三个现代哺乳动物群——盘 动物、有袋动物和单孔动物——都成功了。

Risk factors for placental abruption include acute events like blunt trauma from a car accident, fall, or domestic violence.

盘早剥发生危险因素包括突发事件如车祸创伤、坠落伤或者家庭暴力带来伤害。

Paraceratherium was a placental mammal, like us, meaning that it gestated its young inside its body.

Paraceratherium 一种盘哺乳动物，就像我们一样，这意味着它在体内孕育了幼崽。

It is true that some marsupial species do not adapt to surrounding environments like placental mammals adapt.

确实，一些有袋动物物种不像盘哺乳动物那样适应周围环境。

Australia has a long and well-documented history of marsupial populations coexisting alongside placental mammals.

澳大利亚有袋类种群与盘哺乳动物共存历史悠久且有据可查。

Young offspring are thus able to build resistances to disease in the same manner that placental mammals do.

因此，年轻后代能够像盘哺乳动物一样建立对疾病抵抗力。

With uterine atony, though, the uterus fails to contract after birth, and those placental arteries don't clamp down, leading to excessive bleeding.

不过，对于子宫收缩乏力患者，她们子宫肌层在产后不能继续收缩；没有压力作用于盘动脉，导致失血过多。

That's because, typically, the larger a placental land mammal is, the longer its pregnancies are.

这因为，通常情况下，盘陆地哺乳动物越大，其怀孕时间就越长。

But finally, around 160 million years ago in the Late Jurassic Period, the ancestors of placental mammals and marsupials appeared.

但最终， 大约在 1.6 亿年前侏罗纪晚期，盘哺乳动物和有袋动物祖先出现了。

These extreme blood pressures can lead to a hemorrhagic stroke or placental abruption, in which the placenta detaches prematurely from the uterine wall.

这种严重高血压可能导致出血性脑卒中或者盘早剥，即盘从子宫内壁过早脱落。

Because all of the problems of preeclampsia and eclampsia stem from placental dysfunction, the ultimate treatment is delivery of the fetus and placenta.

由于子痫前期和子痫所有病理变化都起源于盘功能障碍，所以治疗根本方法使儿和盘娩出体外。