Introduction - the pregnant nursing care is governed by standard NOM-007-SSA2 - 2010. In Guerrero, 50% of pregnant women attend consultation during first quarter, concerned delay in contact with health services little correspondence between our services and expectations, objective - 1. Describe and analyze the established dynamic, instituting and institutionalization of nursing care to pregnant women. Qualitative, descriptive method in ten nurses, four medical and ten pregnant women in the third trimester selected by method not probabilistic convenience during prenatal consultation, interviewed in depth at his home, accepting to participate prior informed consent. Stage seven health centers, we used the analysis theme, considering ethical principles and criteria of strictness. Results: three categories; 1 care nursing instituted. Subcategories: 1.1.Care nursing routine according to offic...