title: Continuing challenges in reduction of neonatal mortality.
mesh_terms: D005260:Female; D006801:Humans; D007226:Infant Mortality; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D011247:Pregnancy; D011295:Prenatal Care / Q000191:economics; D012959:Socioeconomic Factors; D014481:United States