The drug can be transferred to the baby via the placenta.

该药会通过胎盘传给胎儿。

《柯林斯英汉双解大词典》

Hemorrhage into the decidua basalis, formed retroplacental hematoma, lead to the separation of the placenta.

出血进入蜕膜基底，形成胎盘后血肿，导致胎盘分离。

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Don't try to pull the placenta out.

不要尝试拉出胎盘。

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The fifth only carried the green protein in its placenta tissue at birth.

VOA: special.2009.06.23

The cells of this surrounding sheet have become different in some way and they develop into the placenta and the extra embryonic tissues.

环抱在周围的这一层细胞,已经开始逐渐分化,最终成为胎盘,及额外的胚胎组织

耶鲁公开课 - 生物医学工程探索课程节选

These cells around the outside form the interface, the placenta, where the maternal blood circulation meets the embryonic circulation and nutrients are passed back and forth that way in a very highly regulated and important way.

外层的细胞形成接触面,即胎盘,是母血与胎血,进行血液交换,及营养物质交换的场所,整个过程高度有序并且非常重要

耶鲁公开课 - 生物医学工程探索课程节选

Problems with the placenta may also contribute to another feature of cloned mammals: They're huge.

CNN: Cloning experts to tell House committee pros, cons

No word on whether the placenta plans to sue for invasion of its privacy.

FORBES: Placenta Lawsuit Gives Birth to Outrage

In some cultures, families bury the placenta in a special place, such as their backyards.

CNN: Placenta: How it works, what's normal