目的：评价胎盘异常的产前超声诊断价值及其妊娠结局。方法：对经产后证实的126例胎盘异常的超声图像进行回顾性分析，并将126例胎盘异常组新生儿与随机选取的204例胎盘正常组新生儿在早产率、新生儿畸形、新生儿体质量方面对照分析，评价胎盘异常对胎儿的影响。结果：126例胎盘异常中，前置胎盘57例，单纯胎盘植入4例，前置胎盘合并胎盘植入15例，胎盘形态异常共43例，胎盘肿物4例，胎盘早剥3例，产前超声正确诊断117例，诊断符合率为92.8%。低体质量儿的发生率在胎盘异常组和对照组间的差异有统计学意义。结论：严重的胎盘异常会导致不良的妊娠结局，产前超声对胎盘位置评价的准确性较高，前置胎盘合并胎盘植入的检出率较单纯胎盘植入的检出率高，后壁胎盘异常易漏诊。

Objective: To investigate the value of ultrasound in diagnosis of placental abnormalities and the outcomes of pregnancy. Methods: Ultrasound images of 126 cases of postnatally confirmed placental abnormalities were analyzed retrospectively. Two hundred and four others were randomly selected from the normal group as control. Rate of preterm birth, birth defects and neonatal weight were analyzed. Relationship between pregnancy outcome and placental abnormalities was also analyzed. Results: Confirmed by delivery or caesarean section, there were a total of 126 cases of placental abnormalities, with 57 cases of placenta previa, 4 cases of placenta implantation alone, 15 cases of placenta previa complicated with placenta implantation, 43 cases of abnormal placental shape, 4 cases of placenta neoplasm and 3 cases of placental abruption. Ultrasound diagnosis was correct in 117 cases, with the diagnosis accuracy of 92.8%. The difference of low birth weight between the two groups was statistically significant. Conclusion: Severe placental abnormalities result in undesirable pregnancy outcomes. Accuracy of prenatal ultrasound diagnosis for placental position and shape is high. The detection rate of placenta previa combined with placenta implantation is higher than simple placenta accreta. The placental abnormality of the back wall of uterus is more easily to be missed.