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Screening for trisomy 21 in twin pregnancies by maternal age and fetal nuchal translucency thickness at 10-14 weeks of gestation.
Sebire NJ, Snijders RJM, Hughes K, Sepulveda W, Nicolaides KH.
BJOG 1996;103:999-1003. -
Down's syndrome screeening in the UK.
Nicolaides KH, Sebire NJ, Snijders RJ, Johnson S, Reynolds TM.
Lancet 1996;347:906-7. -
Intrauterine lethality of trisomy 21 fetuses with increased nuchal translucency.
Hyett JH, Sebire NJ, Snijders RJM, Nicolaides KH.
Ultrasound Obstet Gynecol 1996;7:101-3.