DS. A retrospective cohort of all living DS babies was constituted from two birth-defect registries (Paris : 1981-90, Marseilles area : 1984. Follow-up data was collected: characteristics of baby, birth parents and maternity units, age when given up for adoption and type of foster care. Results showed that 19.4% of infants with DS (115/593) were rejected by th parents. Multiple regression analysis indicated that foreign origin of the mother, area of residence, no associated major malformation, maternal age (15-24), and birth rank (>2) variables were significantly associated with a lower placement rate. Among the 115 abandoned infants with DS, 88 came from unknown parentage (76.5%). For half of them, adoptive placement (88/115) occurred before the age of six months. Socio-cultural attitudes play a great part in these family decisions. Equally, important is the manner in which professionals propose adoption as an alternative to these DS parents. They should be encouraged to consider all options before making a decision so that the best solution can be found for the interest of all.