Screening for trisomy 21 by maternal age, fetal nuchal translucency and maternal serum biochemistry at 11-14 weeks: a German multicenter study
- 1 August 2002
- journal article
- Published by Taylor & Francis in The Journal of Maternal-Fetal & Neonatal Medicine
- Vol. 12 (2), 89-94
- https://doi.org/10.1080/713605621