[Quantitative analysis of socioeconomic factors in premature labor].
D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007752:Obstetric Labor, Premature / Q000209:etiology*; D011044:Poland; D011247:Pregnancy; D011788:Quality of Life; D012959:Socioeconomic Factors
Proba ujecia liczbowego socjoekonomicznych przyczyn w porodach przedwczesnych.