List of Contributors Preface to the first edition Preface 1. Prepregnancy education G. Turner 2. Organization of prenatal care and identification of risk M. Coppens, D. K. James 3. Genetics, risks and genetic counseling P. A. Farndon, M. D. Kilby 4. Sociodemographic factors: Age, parity, social class and ethnicity H. I. J. Wildschut 5. Maternal weight and weight gain H. I. J. Wildschut 6. Bleeding in early pregnancy S. Rosevear 7. Recurrent miscarriage G. M. Stirrat, P. G. Wardle 8. Bleeding in late pregnancy J. C. Konje, D. J. Taylor 9. Multiple pregnancy C. A. Crowther 10 Abnormalities of alpha-fetoprotein and other biochemical tests J. Jankowitz. R. A. Williamson 11. The routine obstetric ultrasound scan C. R. Harman 12. Chorionic villus sampling and placental biopsy W. Holzgreve, P. Miny 13. Amniocentesis T. G. Overton, N. M. Fisk 14 Fetal blood sampling before labor P. W. Soothill 15. Fetal tissue biopsies M. I. Evans, M. P. Johnson, E. P. Hoffmann, ......