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Prenatal Diagnosis|August 22, 2000
Second-trimester prenatal screening for Down syndrome and the relationship of maternal serum biochemical markers to pregnancy complications with adverse outcomeK SpencerBritish Journal of Obstetrics and Gynaecology|December 28, 1999
Second trimester prenatal screening for Down's syndrome using alpha-fetoprotein and free beta hCG: a seven year reviewK SpencerPrenatal Diagnosis|December 11, 1999
The influence of smoking on maternal serum PAPP-A and free beta hCG levels in the first trimester of pregnancyK SpencerPrenatal Diagnosis|March 1, 2000
Screening for trisomy 21 in twin pregnancies in the first trimester using free beta-hCG and PAPP-A, combined with fetal nuchal translucency thicknessK SpencerDyslexia (Chichester, England)|March 8, 2002
Differential effects of orthographic transparency on dyslexia: word reading difficulty for common English wordsK SpencerBJOG : an International Journal of Obstetrics and Gynaecology|November 13, 2001
Age related detection and false positive rates when screening for Down's syndrome in the first trimester using fetal nuchal translucency and maternal serum free betahCG and PAPP-AK SpencerPrenatal Diagnosis|August 22, 2000
The influence of fetal sex in screening for Down syndrome in the second trimester using AFP and free beta-hCGK SpencerClinical Chemistry|June 1, 1991
Evaluation of an assay of the free beta-subunit of choriogonadotropin and its potential value in screening for Down's syndromeK SpencerPageof 230