Abbo, G. and Zellweger, H.: Prenatal determination of fetal sex and chromosomal complement. Lancet1: 216, 1970.
2.
Milunsky, A. , Littlefield, J.W., Kanfer, J.N., Kolodny, E.H., Shih, V.E. and Atkins, L.: Prenatal genetic diagnosis. New Eng. J. Med.283: 1270,1498, 1970.
3.
Nadler, H.L. : Prenatal detection of genetic defects. J. Pediat.74: 132, 1969.
4.
Neel, J.V.: Six experts discuss genetic counseling. Hospital Physician1971: 55.
5.
Réthoré, M.O. , Lafourcade, J., Prieur, M., Castle, B., Cruveillier, J., Tanzy, M. and Lejeune J.: Mere et tille trisomiques 21 libres. Ann. Genet. (Paris) 13: 42, 1970.
6.
Wahrman, J. and Fried, K.: The Jerusalem prospective newborn survey of mongolism. Ann. N. Y. Acad. Sci.171: 2, pp. 341-360, 1970.
7.
Zellweger, H. : Familial aggregates of the 21 trisomy syndrome . Ann. N. Y. Acad. Sci.155: 784, article 3, 1968.
8.
—, White, C. and Kretzschmar , R.: Prenatal genetics and cytogenetics. J. Iowa Med. Soc. To be published.
