名词
中文翻译：胚胎外循环
同义词：
['extraembryonic blood flow', 'extraembryonic blood circulation']
例句：
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1.The extraembryonic circulation is crucial for the development of the fetus.
胚胎外循环对胎儿的发展至关重要。
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2.During the first trimester, the extraembryonic circulation is responsible for the transfer of nutrients and oxygen to the developing fetus.
在孕早期，胚胎外循环负责向发育中的胎儿输送营养和氧气。
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3.In cases of placental abruption, the extraembryonic circulation may be disrupted, leading to fetal distress.
在胎盘早剥的情况下，胚胎外循环可能会被破坏，导致胎儿窘迫。