placental barrier

基本解释

If the cells did cross the placental barrier, the child's immune system should have recognised them as foreign invaders and destroyed them.
如果癌细胞确实穿过胎盘屏障，孩子的免疫系统应该会将它们视为入侵者，从而消灭它们。
Pregnant women are also cautioned not to clean kitty litter boxes because of the risk that Toxoplasma crossing the placental barrier and causing complications.
怀孕的女性也要注意，不要去倒猫沙盒，因为会有弓形虫穿过胎盘屏障，导致并发症的风险。
Terbutaline crosses the placental barrier and blood-brain barrier of the fetus, which may lead to an autistic-spectrum disorder and other developmental disorders.
特布他林穿过胎盘屏障和胎儿的血脑屏障，可能导致自闭症系列障碍和其他精神障碍。

Mercury is a neurotoxin that, when ingested by pregnant women who eat contaminated fish, enters the bloodstream, crosses the placental barrier and impairs fetal brain development, thereby causing mental and physical harms.
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