Perinatal mortality in Ibadan.
D000293:Adolescent; D000328:Adult; D005260:Female; D005838:Genotype; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008423:Maternal Age; D010298:Parity; D010920:Placenta / Q000033:anatomy & histology / Q000166:cytology; D011247:Pregnancy; D011272:Pregnancy, Multiple