title: Infant and perinatal mortality by social and biological factors, 2006.
mesh_terms: D004739:England / Q000453:epidemiology; D005260:Female; D006801:Humans; D007226:Infant Mortality / Q000639:trends*; D007231:Infant, Newborn; D054238:Perinatal Mortality / Q000639:trends*; D011247:Pregnancy; D012307:Risk Factors; D014852:Wales / Q000453:epidemiology