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。方法：在Ｂ超下对中山一院１９９４年８月～１９９５年１月，孕龄３０～４２周的单胎妊娠孕妇９１例进行胎盘成熟度分级和胎肺成熟度检查。结果：在进行监测的９１例孕妇中，０级胎盘分布孕龄较Ⅰ～Ⅲ级胎盘组明显小（Ｐ＜００５）。羊水中磷脂酰胆碱或称卵磷脂／鞘磷脂值（Ｌ／Ｓ）与孕周、胎头双顶径（ＢＰＤ）、股骨长度（ＦＬ）呈直线正相关。胎盘成熟度分级与磷脂酰甘油（ＰＧ）阳性率无相关性。在正常妊娠情况下，胎盘成熟度分级、胎肺成熟与孕龄呈正相关。在病理妊娠情况下，两者无相关性。结论：在正常情况下，胎盘成熟度分级可作为衡量胎肺成熟的指标；在病理情况下，胎盘成熟度分级不能反映胎肺成熟情况，不能作为衡量胎肺成熟的指标 Objective: To explore the relationship between placental maturity grade and fetal lung maturity in order to improve the level of fetal monitoring. Methods: A total of 91 pregnant women with singleton pregnancies ranging from 30 to 42 weeks in Zhongshan Hospital from August 1994 to January 1995 were examined for placental maturity and fetal lung maturity. Results: Among the 91 pregnant women monitored, the distribution of grade 0 placenta was significantly smaller (P <005) than that of grade Ⅰ ~ Ⅲ placenta. The amniotic fluid phosphatidylcholine or lecithin / sphingomyelin value (L / S) and gestational age, fetal head biparietal diameter (BPD), femoral length (FL) showed a linear correlation. There was no correlation between placental maturity grade and the positive rate of phosphatidylglycerol (PG). In the case of normal pregnancy, placental maturity grade, fetal lung maturity was positively correlated. In the case of pathological pregnancy, no correlation between the two. Conclusion: Under normal circumstances, placental maturity grading can be used as a measure of fetal lung maturity index; in pathological conditions, placental maturity rating can not reflect fetal lung maturity, can not be used as a measure of fetal lung maturity indicators