RESUMEN
A first experiment aimed at collecting data from 98 maternity hospitals grouped in the AUDIPOG Sentinel Network addressed 7,837 deliveries in January, 1994. The technique used for recovering the results was adapted from the quota method and aimed at strict respect of marginal distributions of deliveries per regional area and per hospital type, and at the best the joint distribution of deliveries per regional area/hospital type, to obtain estimates of perinatal health indicators. Selection indicators (age, family status, socio-economic conditions, previous history), practising indicators (supervision of the pregnancy, entrance motive, presentation, delivery mode, anaesthetic) and result indicators (prematurity, small for date, transfer, pathology of the new-born) are given.