During the whole of gestation period, the nutrition of fetus is ingested by the blood circulation between maternal and fetus.
在整个妊娠期间，胎儿的营养摄入主要是通过母子血液循环获得的。
During the whole of gestation period, the nutrition of fetus is ingested by the blood circulation between maternal and fetus.
在整个妊娠期间，胎儿的营养摄入主要是通过母子血液循环获得的。
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