This ecological study presented analyze of the birth pathways in the Rio de Janeiro City and identification of the relationship between the health services offer and pregnant flow between their households and the maternity. It was used the data available in the Mortality Information System (MIS) and Live Birth Information System (LBIS) in 2004. The TabWin program processed the data and drew the maps. The LBIS processed 99,042 declarations of live birth and MIS processed 1,318 declarations of deaths in less than one year old in the Rio Janeiro City. The conclusion was that the possibility of intervention in the infantile and maternal mortality profile has happened at the health services, and the access to the quality assistance has fundamental hole in the mortality determination. The existence of access inequalities to the services must be investigated.