共 14 条
[1]
A sonographic sign for the detection in the second trimester of the fetus with Down syndrome. Benacerraf BR,Barss Va,Laboda La. American Journal of Obstetrics and Gynecology . 1985
[2]
Nuchal -fold thickening in Down syndrome fetuses: Transient appearance and spontaneous resolution in the second trimester. Itoh H,Ihara Y,Sagawa N,et al. Prenat Med . 1993
[3]
Estimated rates of Down Syndrome in live births by one year maternal age interval for mothers aged 20-49 in a New York state study-implications of the risk figures for genetic counseling and cost benefit analysis of prenatal diagnosis programs. Hook EB,Chambers GM. Birth Defects Original Article Series . 1977
[4]
Fetal nuchal translucency: ultrasound screening for chromsomal defects in first trimester of pregnency. Nicholaides KH,Azar G,Byrne D,et al. British Medical Journal . 1992
[5]
An association between low matersonal serum a-fetoprotein and fetal chromosomal abnormalities. Merkatz IR,Nitowsky HM,Macri JN,et al. American Journal of Obstetrics and Gynecology . 1984
[6]
Screening for Down’ s syndrome : effects safety, and cost effectiveness of first and second trimester strategies. R E Gilbert,C Augood,R Gupta,et al. British Medical Journal . 2001
[7]
Prenatal screeening for Down’ s syndrome with the use of maternal serum markers. Hoddow JE,Dalomaki GE,Kinght GJ,et al. The New England Journal of Medicine . 1992
[8]
Free beta human chorioni gonadotropin in Down’ s syndrome screening: a multicentre study of its role compared with other biochemical markers. Sphencer k,Coombes EJ,Mallard AS,et al. Annal of clinical Chemistry . 1992
[9]
Sonographic diagnosis of Down syndrome in the second trimester. Benacerraf BR,Frigoletto FD,Laboda LA. American Journal of Obstetrics and Gynecology . 1985
[10]
Integrated screening for Down’ s syndrome based on the first and second trimester. Wald NJ,Want HG,Hackshaw NK. The New England Journal of Medicine . 1999