2Wald NJ, Hackshaw AK, George LM. Assay precision of serum alpha fetoprotein in ante natal screening for neural tube defects and Down's syndrome [J]. J Med Sereen, 2000, 7 (3): 168.
3Rzesh R, Thomas SV. Prenatal screening for neural tube defects [J]. Natal Med J India, 2001, 14 (6): 343.
5Jobanputra V, Roy KK, Kucheria K. Prenatal detection of aneuploidies using fluorescence in situ hybridization: a preliminary experience in an Indian set up. J Biosci,2002,27(2): 155-163
6Miny P, Tercanli S, Holzgreve W. Developments in laboratory techniques for prenatal diagnosis. Curr Opin Obstet Gynecol, 2002,14(2) : 161-168
7Speel EJ, Ramaekers FC, Hopman AH. PCR-based detection of nucleic acids in chromosomes, cells, and tissues: technical considerations on PRINS and in situ PCR and comparison with in situ hybridization. Methods Mol Biol, 2003,226 ( 5 ): 405-424
8Raty R, Anttila L, Virtanen A. Maternal midtrimester free betaHCG and AFP serum levels in spontaneous singleton pregnancies complicated by gestational diabetes mellitus, pregnancy-induced hypertension or obstetric cholestasis. Prenat Diagn, 2003,23 ( 13 )
9Palomaki GE, Knight GJ, Roberson MM. Invasive trophoblast antigen (hyperglycosylated human chorionic gonadotropin) in secondtrimester maternal urine as a marker for Down syndrome: preliminary results of an observational study on fresh samples. Clin Chem,2
10Schuchter K, Hafner E, Stangl G. The first trimester ‘ combined test' for the detection of Down syndrome pregnancies in 4939 unselected pregnancies. Prenat Diagn,2002,22(3) :211-215
