title: [Clinical and epidemiologic research of perinatal risk factors in a population under the Instituto Mexicano del Seguro Social. Organization of the study].
mesh_terms: D005260:Female; D006801:Humans; D008800:Mexico; D009313:National Health Programs; D009934:Organization and Administration; D011247:Pregnancy; D011295:Prenatal Care / Q000379:methods; D011367:Professional Staff Committees; D012107:Research Design; D012306:Risk; D012943:Social Security
vernacular_title: Investigación clínica y epidemiológica de los factores de riesgo perinatal en la población adscrita al Instituto Mexicano del Seguro Social. II. Organización de la investigación.