The sex ratio in Spina bifida.
D004739:England; D005260:Female; D005804:Genes, Lethal; D005808:Genes, Recessive; D005828:Genetics, Population; D006801:Humans; D008297:Male; D012737:Sex Factors; D012744:Sex Ratio; D016135:Spinal Dysraphism / Q000453:epidemiology / Q000235:genetics*