W A Miller

International, collaborative assessment of 146,000 prenatal karyotypes: expected limitations if only chromosome-specific probes and fluorescent in-situ hybridization are used.

K. Nicolaides, W. Holzgreve, L. Jackson, 1999, Human reproduction.

The effect of fetal gender on the prediction of Down syndrome by means of maternal serum alpha-fetoprotein and ultrasonographic parameters.

C. Lockwood, R. Lapinski, C J Lockwood, 1993, American journal of obstetrics and gynecology.