This study seeks to analyse the uptake of preventive and curative child health services in three health centres in Maputo, Mozambique. Within the context of overall social and economic change, Mozambique has given priority to Primary Health Care as the driving force of its newly developed National Health Service, with a principal focus on maternal and child health. Three health centres were selected from areas of contrasting environmental quality. Data were collected from over 6000 women attending the curative and preventive child health services at these centres. It was found that the women using curative services had significantly higher child mortality rates, had lived less time in Maputo City and had children of lower weight status than their counterparts attending for preventive care. Additionally, levels of child mortality were found to increase as environmental quality decreased. It is argued that the lower users of preventive care are, as in the U.K., precisely those who appear to have an increased risk of mortality and morbidity. It is concluded that integration between the curative and preventive health services must be increased in order to overcome the user inertia which militates against the poorer population using the facilities for prevention to the best advantage. This would fit in both with national strategies (1) and WHO recommendations (2-4) in the field of primary health care.