...
机译:前瞻性研究评估的性能对于妊娠前三个月的联合筛查称21三体综合症使用重复抽样的孕产妇血清标记PAPP-A和自由βhcg。
Fetal Medicine Unit, Department of Obstetrics, Rigshospitalet, Copenhagen University Hospital;
Trisomy 21; blood specimen; Screening formaternal serumFirst Pregnancy TrimesterPregnancy-Associated Plasma Protein-A;