[Prematurity as viewed by an obstetrician. II. Factors that influence prematurity].
D000428:Alcohol Drinking / Q000473:pathology; D005260:Female; D006801:Humans; D007086:Illegitimacy; D007231:Infant, Newborn; D007234:Infant, Premature; D011247:Pregnancy; D012847:Single Person; D012907:Smoking; D012959:Socioeconomic Factors
La premadurez vista por un obstetra. II. Factores que influencian la premadurez.