Objective: to study the relation between placental mature grading and fetal pulmonary maturity to improve the level monitoring fetus.
目的：探讨胎盘成熟度分级与胎肺成熟度之间的联系，以提高对胎儿的监测水平。
Objective: to study the relation between placental mature grading and fetal pulmonary maturity to improve the level monitoring fetus.
目的：探讨胎盘成熟度分级与胎肺成熟度之间的联系，以提高对胎儿的监测水平。
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