@article{44bc2f16777843cb92493eae6be995b3,
title = "First-trimester screening for trisomy 21 in Denmark: implications for detection and birth rates of trisomy 18 and trisomy 13",
abstract = "In Denmark a new national guideline for prenatal screening and diagnosis was issued in 2004 according to which all pregnant women should be offered a first-trimester combined risk assessment for trisomy 21 (T21). The aim of this study was to investigate whether the new screening strategy for T21 has changed the gestational age at which trisomy 18 (T18) and trisomy 13 (T13) are diagnosed prenatally, and the number of infants born with T18 or T13.",
keywords = "Adult, Biological Markers, Birth Rate, Chorionic Gonadotropin, beta Subunit, Human, Chromosome Disorders, Chromosomes, Human, Pair 13, Chromosomes, Human, Pair 18, Denmark, Down Syndrome, Female, Gestational Age, Guidelines as Topic, Humans, Maternal Age, Nuchal Translucency Measurement, Pregnancy, Pregnancy Trimester, First, Prenatal Diagnosis, Trisomy",
author = "Ekelund, {C K} and Ole Petersen and Skibsted, {Leif Horsfelt} and Susanne Kj{\ae}rgaard and Ida Vogel and A Tabor and {Danish Fetal Medicine Research Group} and Zingenberg, {Helle Jeanette} and J{\o}rgensen, {Finn Stener} and Annamari Nikkil{\"a} and Anne-Cathrine Shalmi and Sperling, {Lene S{\o}ndergaard}",
note = "Copyright {\textcopyright} 2011 ISUOG. Published by John Wiley & Sons, Ltd.",
year = "2011",
doi = "10.1002/uog.8929",
language = "English",
volume = "38",
pages = "140--4",
journal = "Ultrasound in Obstetrics & Gynecology",
issn = "0960-7692",
publisher = "John Wiley and Sons Ltd",
number = "2",
}