胎盘和覆盖它的组织（称作绒毛膜）跟你的身体是同一种遗传物质组成的，它们可以提供重要的关于先天缺陷的信息。

The placenta and tissue covering it ( called chorionic villi) are made up of the same genetic material as your baby and can provide important information about birth defects.

youdao

绒毛膜：在爬行类动物，鸟类及哺乳类动物中包含胚胎的外膜，在有胎盘哺乳动物中与胎盘的发育有关。

Chorion: the outer membrane enclosing the embryo in reptiles birds and mammals. in placental mammals it contributes to the development of the placenta.

youdao

绒毛膜：在爬行类动物、鸟类及哺乳类动物中包含胚胎的外膜，在有胎盘哺乳动物中与胎盘的发育有关。

Chorion: the outer membrane enclosing the embryo in reptiles birds and mammals. in placental mammals it contributes to the development of the placenta.

youdao