[Epidemiological and biological aspects of immaturity].
D001724:Birth Weight; D002677:Chile; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008423:Maternal Age; D007752:Obstetric Labor, Premature / Q000453:epidemiology*; D011247:Pregnancy
Aspectos epidemiológicos y biológicos de la dismadurez.