References
- Donald I., MacVicar J., Brown T. G. Investigation of abdominal masses by pulsed ultrasound. Lancet 1958; 1188
- Hellman L. M., Kobayashi M., Cromb E. Ultrasonic diagnosis of embryonic malformations. Am J Obstet Gynecol 1973; 115: 615
- Hendricks C. H. Twining in relation to birth weight, mortality and congenital anomalies. Obstet Gynecol 1966; 27: 47
- Jouppilla P., Kaupilla A., Koivisto M., Moilanen I., Ylikorkala O. Twin pregnancy. The role of active management during pregnancy and delivery. Acta Obstet Gynecol Scand, Suppl. 1975; 44: 13
- Kohorn E. I., Kaufmann M. Sonar in the first trimester of pregnancy. Obstet Gynecol 1974; 44: 473
- Kurjak A. The antenatal diagnosis of fetal malformations and abnormalities by ultrasound. Ultrasonics in Medicine, E. Kazner, M. de Vlieger, H. Müller. Excerpta medica, Amsterdam and Oxford 1975; 304
- Kurjak A. Ultrasonic detection of fetal malformation and abnormalities. Handbook of Clinical Ultrasound, A. Kratochwil. John Wiley and Sons, New York 1978; 189
- Kurjak A. Direct ultrasonic diagnosis of fetal abnormalities. Recent Advances in Ultrasound Diagnosis, A. Kurjak. Excerpta medica, Amsterdam 1978, (in press)
- MacGillivray I. Malformations and other abnormalities in twins. Human Multiple Reproduction, I. MacGillivray, P. P. S. Nylander, G. Gorney. Saunders, London 1975; 165
- Reinold E. Ultrasonics in Early Pregnancy. Karger, Basel 1976; 95. S.
- Robinson H. The diagnosis of early pregnancy failure by sonar. Br J Obstet Gynaecol 1975; 82: 849
- Robinson H. Sonar evidence of early pregnancy failure in patients with twin conceptions. Br J Obstet Gynaecol 1977; 84: 22
- Stevenson A. C., Johnston H. A., Stewart M. I., Goldin D. R. Congenital malformations. A report of a study on a series of consecutive births in 24 centers. Bull WHO 1966; 34: 1–127