Social background of mothers who smoke during pregnancy and influence of these factors on the offspring.
D001724:Birth Weight; D002675:Child, Preschool; D004522:Educational Status; D004651:Employment; D005260:Female; D005387:Finland; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D009017:Morbidity; D011247:Pregnancy; D012907:Smoking / Q000150:complications* / Q000523:psychology; D012923:Social Class; D012959:Socioeconomic Factors