In 8 cases of trisomy pregnancy,the mean PAPP-A MoM in the second trimester was 0.72 MoM.

• 在本组8例三体综合征胎儿妊娠的孕妇中；孕期血清PAPP-A中位数倍数(multiples of the median；MoM)的平均值为0.；72MoM。