title: A six-year perinatal study.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008427:Maternal Health Services / Q000592:standards; D009820:Ohio; D010500:Perinatology / Q000592:standards*; D011247:Pregnancy; D011295:Prenatal Care / Q000592:standards*; D012959:Socioeconomic Factors