[The problem of causality in the analysis of perinatal mortality].
D005260:Female; D005313:Fetal Death / Q000453:epidemiology / Q000209:etiology*; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000401:mortality*; D007235:Infant, Premature, Diseases / Q000401:mortality; D008800:Mexico; D011247:Pregnancy
El problema de la causalidad en el análisis de la mortalidad perinatal.