Perinatal problems.
D001724:Birth Weight; D005260:Female; D005313:Fetal Death / Q000453:epidemiology; D006801:Humans; D007224:Infant Care; D007226:Infant Mortality; D007231:Infant, Newborn; D008427:Maternal Health Services; D008429:Maternal Welfare; D011247:Pregnancy; D011295:Prenatal Care; D012907:Smoking; D012959:Socioeconomic Factors; D006113:United Kingdom