title: Standardized perinatal mortality ratios: technique, utility and interpretation.
mesh_terms: D002662:Child Health Services / Q000592:standards; D005260:Female; D005313:Fetal Death; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008427:Maternal Health Services / Q000592:standards; D011247:Pregnancy; D006113:United Kingdom