Table of Contents

1 Chromosomal abnormalities in single gene disorders.- 2 The role of chromosome heteromorphism in developmental anomalies.- 3 Embryonic development in patients with a high risk of early pregnancy loss.- 4 Human chromosome polymorphism and congenital defects.- 5 H-Y antigen and the aetiology of genetic disorders in sex determination.- 6 Effect of chromosome changes on body and mind development.- 7 Early psychomotor development of children with sex chromosome aneuploidies.- 8 Syndrome delineation and its implications for the study of pathogenetic mechanisms.- 9 Numerical taxonomy in the study of birth defects.- 10 A comparison of the anatomical variations found in trisomies 13, 18 and 21.- 11 Current concepts in congenital adrenal hyperplasia.- 12 Epidemiology of birth defects in twins.- 13 Prenatal diagnosis of genetic diseases by amniocentesis.- 14 Congenital anomalies: the role of ultrasound.