[Spontaneous premature birth. Statistical analysis].
D000328:Adult; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007558:Italy; D007752:Obstetric Labor, Premature / Q000453:epidemiology*; D011247:Pregnancy; D012189:Retrospective Studies
Il parto prematuro spontaneo. Contributo clinico statistico.