Trends in maternal age distribution and the live birth prevalence of Down’s syndrome in England and Wales: 1938–2010

Twenty-year trends in the prevalence of Down syndrome and other trisomies in Europe: impact of maternal age and prenatal screening

(2012) Maria Loane et al.   EUROPEAN JOURNAL OF HUMAN GENETICS

Noninvasive detection of fetal trisomy 21 by sequencing of DNA in maternal blood: a study in a clinical setting

(2011) Mathias Ehrich et al.   AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY

Prevalence of Down Syndrome Among Children and Adolescents in 10 Regions of the United States

(2009) M. Shin et al.   PEDIATRICS

Ascertainment and accuracy of Down syndrome cases reported in congenital anomaly registers in England and Wales

(2008) G M Savva et al.   Archives of Disease in Childhood-Fetal and Neonatal Edition

Twenty-year trends in prevalence and survival of Down syndrome

(2008) Claire Irving et al.   EUROPEAN JOURNAL OF HUMAN GENETICS

Is Down Syndrome a Disappearing Birth Defect?

(2007) Veronica R. Collins et al.   JOURNAL OF PEDIATRICS